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Old 07-21-2003, 01:35 PM   #1
AzNStiImpreza
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Lightbulb What oil to use?!?

Sup guys. i would like to know what kind of oil I should be using for my car for optimal performance. I do the engine oil changes by myself and i've always been using Castrol GTX 10w-30 for my car.

Recently i've been hearing a lot of talk about Synthetic oils. I was wondering what the main differences were between the normal and the synthetic when it comes to car engine performance.

My car has about 67000 miles and it is modded. I have injen cold-air intake, apex n1 cat back exhaust, Rallispec Cams, unorthodox racing pulleys, and Borla Header. I just thought that maybe since i have mods such as Cams that i should be using "better" oil.

any advice or info would be nice. thanks.

-Vu-
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Old 07-21-2003, 02:38 PM   #2
North Ursalia
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Not to be 'that guy' but the best thing to do is actually read and/or search through the forums. These topics have been covered and rehashed more times than I can count .


Brian

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Old 07-21-2003, 09:18 PM   #3
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not to be that guy but everybody always says "do a search" "do a search". im tired of that bull crap. people say once every 6 months to me, and once every 6 months to someone else. unlike some of u out there, i dont have all day to searcht he damn internet. all i want is a quick and easy answer. my thread is almost a yes or no question. i dont have time to do searches. i want to go on the net, check my email, check my thread for my answer, and get the hell out. if i have time, ill do a freakin search. honestly, with the time u spend typing in... "do a search and blah blah blah blah..." u can just tell me the freakin answer. these forums are almost useless these days, soon, everyone is going to search and no threads are going to be posted for answer...
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Old 07-21-2003, 09:50 PM   #4
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wanna see why i dont have time to do 20 seraches....cuz of crap like this...

"Sorry. The search function is temporarily "Out of Service" because too many people are currently searching.



It will be back shortly... be patient please..."



that is exactly wut came up when i tried to search...
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Old 07-22-2003, 04:50 AM   #5
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I use 'Selenia Racing' full-synth oil and I'm very happy with it. It eliminated the ticking sound my car had before (with *some* mineral oil).

D.
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Old 07-22-2003, 08:51 AM   #6
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I just switched to Mobil 1 5W-30 synthetic with a Purolator PureOne filter. I will probably change after 3000 miles this time as the engine is still newer, then bump it up to 6000 after that. I didn't really notice a difference, but I don't have any complaints either.
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Old 07-22-2003, 03:51 PM   #7
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thanks guys. i might just give the synthetic oils a shot. Castrol Syntec maybe.
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Old 07-22-2003, 04:01 PM   #8
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your answer is here...

linky



If you knew the answer, why'd you ask the question. Do a search is a quality answer when the question has been beaten into the ground. I'd also take into account that in my humble opinion the quality of answers has dropped off over the years, and that older answers, might actually be more valid. for what it's worth, I've ran synthetic in my car since 2.5k. It consumes more oil, and it's more expensive, and I don't notice a difference between dino and synt, but I do it just because.
AO
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Old 07-22-2003, 05:17 PM   #9
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Quote:
Originally posted by North Ursalia
Not to be 'that guy' but ...
Hey, what did I do...

Dino oil = refined petroleum
Synthetic oil = manufactured

Being a manufactured product, synthetic oil can be tailor made and have better lubricating properties.
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Old 07-22-2003, 06:31 PM   #10
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Quote:
Originally posted by That Guy


Hey, what did I do...

Dino oil = refined petroleum
Synthetic oil = manufactured

Being a manufactured product, synthetic oil can be tailor made and have better lubricating properties.
IIRC synthetic also uses a base of dino oil, just custom tailored. As for "do a search", I agree. I disagree with the rant in return. For one, there is no need to get rude when expecting an answer - if nothing else "do a search" equals a free bump to your question. Secondly, if all you want to do is read for an answer and get off, am I to assume that you don't bother helping other people? That is what's wrong with the boards.
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Old 07-22-2003, 09:57 PM   #11
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occassionally i do help out people, but only things that i may know of. i know very little. also, i apologize for the rant, but i wake up at 5am and work til 2:30pm every day at a crappy job, and i dont have time to role in and searcht he net for things. i go to the gym and use time to catch up on sleep.
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Old 07-22-2003, 10:12 PM   #12
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Post I have the same Q

Okay, I have been researching synth oils for a couple days for my exact question and details I am concerned about. This is what I have found.
I have a MY00 and want to switch to synths @ ~45k and wonder about any adverse affects. Short answer seems to be no, there should be no problems switching.
It took me a while( = many hours on the web, my job allows me to do that :-)) , but I think I am satisfied. There is a wealth of info out there, some good, some extraneous. I understand the "Do the search" frustration, searches do not always answer your question, but constantly adding new threads also hurt the performance of the boards too.
hth
-jason
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Old 07-23-2003, 03:50 AM   #13
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Default Re: I have the same Q

Quote:
Originally posted by Scooby Blue
Okay, I have been researching synth oils for a couple days for my exact question and details I am concerned about. This is what I have found.
Here is an explanation on why synth oils were not recommended for every engine and why that isn't so anymore.

It even explains why you shouldn't use synthetic oil during brake-in...

D.
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Old 07-23-2003, 06:34 AM   #14
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Post mucho info

also here is a wealth of information that I have barely begun to wade through! I found the site in the course of my search, it has popped up more than once. Very good source of info!
-jason
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Old 07-23-2003, 01:07 PM   #15
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Quote:
Originally posted by m750
your answer is here...

linky


my $.02 in defense of AzNStiImpreza: the search functionality is marginally functional at best.

1) no searches within 60 seconds of each other? so you mess up the search string, and then have to wait 60 seconds to try again?? not cool...

2) minimum word count for searches? this requires that you know what you are looking for... sometimes it can't be nailed down that finely, which results in little/no results, which leads to the above- see #1.

3) doesn't count numbers as words? try searching for 2.5ts... see #2.

4) the search is down quite often due to the number of people searching and getting results indicative of #1, #2, #3

don't get me wrong, i love this forum. i've found a lot of good info, but the search is mostly useless unless you know _exactly_ what you are looking for... i'm new to this scene and don't always know what exactly i'm looking for, what something is exactly called, etc...
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Old 07-23-2003, 04:30 PM   #16
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AzbtzntsImpreza got some lip on him: needs a spankin'! The nerv o' him...
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Old 07-23-2003, 06:38 PM   #17
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hey Poison, I hope you're not talking about me and i hope that that isnt my SN that you altered to make me seem like a b i tch.

why u gotta beef like that?

i found it funny that i didnt open my lips once while TYPING on the thead.
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Old 07-23-2003, 09:03 PM   #18
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orndog: "synthetic also uses a base of dino oil" not correct. Speaking on truely synthetic oils (not the crap that can be called synth now) a few of the cheaper brands will be synthetic as a base and dino as a carrier for additives. Mobil 1 for example has a synthetic base AND a synthetic additive, 100% synthetic.

Im sure the Amsoil followers will explain exactly how the Amsoil products work.

I agree that the search function has gone to hell lately. Having it "temporarily disabled" for 10 minutes at a time can make you very angry
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Old 07-23-2003, 09:51 PM   #19
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I'm just kidding AzchImpreza! Your pissy post was funny. I think it is funny too that you didn't open your lips while typing this 'thead'!
Anyway, there is a lot of info out there, but if you don't have time to rot in front of the computer like WE ALL DO, go to www.bobistheoilguy.com . There is enough there to make you run full speed into a brick wall. Take care...
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Old 07-23-2003, 10:17 PM   #20
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Yes, Mobil1 uses 'synthetic additives' to be 100% tri-synthetic, but then is it completely oil?. Castrol isn't synthetic in the way most of us think of synthetic (man-made), it, like most synth oils, is man rearranged. Royal Purple is 100% synthetic oil, but I never really cared for purple oil. My money will try Mobil1 when it's time. I put it in my Focus once and had rattling valves - go figure.
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Old 07-24-2003, 05:39 AM   #21
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Default Synth Vs. Dino

First, do you track/autoX/rally your car?
If yes, then go Synthetic cuz it dispenses contaminates and lubricates better.

If no, then stick with Dino oil. You're wasting your money switching to synthetic. And those who consider aggressive street driving as a need to upgrade to synthetic thats just lame. No matter what you do on the street its uncomparable to what a car endures during track/autoX/rally. Dino is more than adequate for street and unless you push it to extremes in competition the polymers won't breakdown. So stick with Dino and change it every 3000miles.
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Old 07-24-2003, 09:43 AM   #22
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Short trips will be hard on your oil too. Also, synthetic just lubricates better, end of story. That said, I've had two cars traded in with 200k miles on them that I put nothing but dino oil in every 3k miles. They are both still running for their present owners. I think many of the real world claims of synthetics might be due to a testing error similar to this - people who buy synth oils are the same ones who care about their cars and therefore take care of them, so of course those are the same cars that run forever.
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Old 07-24-2003, 03:01 PM   #23
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nixx/orndog: Exactly. You got it right.

No one can argue that synthetics aren't better, its proven they are better. Question is will you ever need oil better than whatever is on sale at Wal Mart.
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Old 07-24-2003, 09:03 PM   #24
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thanks for all the good information...i got all this information without doing 1 search...not bad if u ask me.

anyway, i just asked this oil question cuz i have a feeling my car is running funny, as in, not as good as it can be. i have a pretty good amount of modifications to my car, and maybe im just paranoid about my. i just thought maybe the car will run more "smoothly" with synthetic. oh, and yes i'm thinking about autocrossing after doing more suspension modifications, but im not actively autocrossing...

although i do race a lot on Gran Turismo 3, Auto Modellista, Tokyo Extreme Racer Zero...so maybe i do need synthetic oil...

i might just give the synthetic oil a try on my next oil change. just to see if my car runs more "smoothly"...maybe it is jus tthe freakin hot weather... or it is just time for an ej20t engine swap...

just PM me if u are interested in DONATING money to me...via paypal... for my ej20t project...much thanks...
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Old 07-25-2003, 12:02 AM   #25
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I've been really happy using both 5w30 and 10w30 Mobil 1. I would say that the 10w30 is better suited for hot weather.
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