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Old 06-07-2003, 08:54 PM   #1
SCOOBER
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Default RS-T Oil Weight?

I had always used Pennzoil 5w/30 in my Subarus....and have had good luck with it so far, but the oil seems to get really thin with the turbo on the car. I have 105,000 on the motor...and when I pull the dipstick out the oil is alot darker than usual and is thinner than before. What type / weight are you guys using in RS-T's?

Thanks!!
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Old 06-08-2003, 12:21 AM   #2
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I heard some people said 10w30 is good enough


SWAT
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Old 06-08-2003, 02:10 AM   #3
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I run 15w50 in my RS-T
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Old 06-08-2003, 11:54 AM   #4
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I ran 5w30 when I first put in my turbo, it was very thin and I think it was leaking through the turbo bearing or somewhere else. But now since I run 10w30 I haven't really been burning any oil.
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Old 06-08-2003, 12:41 PM   #5
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Im running 5w30 mobil 1 in mine. Its burning a little oil and thinking of moving up a grade to 10w30
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Old 06-08-2003, 03:26 PM   #6
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I'm running Syntec 10w30. Working fine so far. No burning of oil that I've noticed.
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Old 06-08-2003, 08:25 PM   #7
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If you are using a synthetic, then use Mobil 1 15w50...

If you are using regular oil, then use Pennzoil 20w50...

Zee
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Old 06-08-2003, 09:03 PM   #8
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I've been using 10w-30 mobil 1 synth.
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Old 06-09-2003, 01:16 AM   #9
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I can't believe people are reccomending pennzoil in here. If you like wax in your engine keep using that pennzoil. Ever seen a pennzoil engine taken apart? The internals are all yellow. It's the wax (i.e. parafin count) in pennzoil and quaker state that colors these parts yellow. Please go with some good oil like castrol, valvoline, or mobile 1.
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Old 06-09-2003, 10:14 AM   #10
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I'm running Castrol Syntec blend in 10W-40, so far so good... every time I've checked the oil since my last change its been honey gold colored and silky smooth . I'm actually getting better results with it than I had with Mobil1 pre-turbo... go figure.
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Old 06-09-2003, 12:18 PM   #11
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been running mobil 1 synthetic 10w30 for over a year and have had no problems as of yet. (i know i just jinxed myself )

-robbie
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Old 06-09-2003, 02:21 PM   #12
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In all my performane engines I only use (After the breakin) Mobil 1 15w50.
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Old 06-09-2003, 08:05 PM   #13
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Quote:
Originally posted by Drac9
I can't believe people are reccomending pennzoil in here. If you like wax in your engine keep using that pennzoil. Ever seen a pennzoil engine taken apart? The internals are all yellow. It's the wax (i.e. parafin count) in pennzoil and quaker state that colors these parts yellow. Please go with some good oil like castrol, valvoline, or mobile 1.
Please explain how the color of the internals affects the parts' life...

Whats Parafin?

Wax reduces friction right?...Isn't the job of motor oil to reduce friction?

I also use 1 quart of Lucas Oil Stabilizer and man is that stuff yellow and thick...

So basically your'e saying that Pennzoil and Quaker State are inferior brands of oil?

Zee
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Old 06-10-2003, 09:20 AM   #14
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I have to agree with Drac9. The amount of sludge built up in the Quaker State engines I've seen amazes me... the stuff is garbage.
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Old 06-10-2003, 01:35 PM   #15
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I have to agree with Drac9 on the Quaker State issue....I had one car that had only seen Quaker State for the whole 190,000 miles before I got it....changed at 3K ( It was a 79 280Z and he had all the receipts...original owner. Lot's of papers ) and when I had the engine apart it was nasty inside. The lifters and the top-end in general looked really bad as far as sludge and buildup.

On the other end, I had our '97 Outback apart at 105,000 on Pennzoil and it looked like brand new! Same thing with my '99RS at 105,000 (ironic they both come apart at the same mileage) and it looked like a new engine in the cam/lifter areas.

My only concern at this point was the wieght of the oil with the added heat of the turbo...and how thick is thick enough for the car without limiting flow. I didn't really want to go full synthetic, as it seems to seep at the seals on alot of motors after time, but I would consider a blend (maybe). What are the pros / Cons to blends??

Thanks for the input so far!!
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Old 06-10-2003, 01:46 PM   #16
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Quote:
Originally posted by SCOOBER
My only concern at this point was the wieght of the oil with the added heat of the turbo...and how thick is thick enough for the car without limiting flow. I didn't really want to go full synthetic, as it seems to seep at the seals on alot of motors after time, but I would consider a blend (maybe). What are the pros / Cons to blends??
That's actually why I went blend. I've been down the synth route and I'm too anal about changing my oil and synth gets expensive. On the flip side, I've run dyno since the new block went in ~37k ago and was unimpressed. So I split the difference when the turbo went in and am quite happy
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Old 06-10-2003, 05:36 PM   #17
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You don't think that the L28 that has 190,000miles will have dirt and sludge build up anyway? Especially when you consider the oil gets dirty from the intake air and not from the combustion gases...

You can't say the oil is getting sludged up without proving it...

Jeff Gordon and Kenny Tran are sponsored by Quaker State and they use and win...

I think that saying its not recommended without actually testing them out is foolish...

I'm sure there are tests already conducted by various institutes on different brands of oil in similar conditions...See if you can find it and prove that Quaker State is an inferior Oil when compared to others...

Zee
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Old 06-10-2003, 06:25 PM   #18
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I use Syntec 10-40 at the moment, works well, comes out smooth. Then again I change every 3k
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Old 06-11-2003, 11:01 AM   #19
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Quote:
Originally posted by SCOOBER
I have to agree with Drac9 on the Quaker State issue....I had one car that had only seen Quaker State for the whole 190,000 miles before I got it....changed at 3K ( It was a 79 280Z and he had all the receipts...original owner. Lot's of papers ) and when I had the engine apart it was nasty inside. The lifters and the top-end in general looked really bad as far as sludge and buildup.

On the other end, I had our '97 Outback apart at 105,000 on Pennzoil and it looked like brand new! Same thing with my '99RS at 105,000 (ironic they both come apart at the same mileage) and it looked like a new engine in the cam/lifter areas.

Quaker State and Pennzoil are the same company. Or atleast made from the same plant.
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Old 06-11-2003, 10:35 PM   #20
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So Jeff Gordon and Kenny Tran get sponsored by Quaker State and they use it and win.....the point?

If someone wants to pay me the money they make, I would drive the car around with a crankcase full of whatever they wanted! I also highly doubt that the oil run in the cars they use comes from the local auto parts store fresh off the shelf. I am sure that someone wins with Champion spark plugs once in awhile, too, but I won't be running those anytime soon. And yes, I already know they are a factory item in some Subaru cars, but it still doesn't make them any good.

I think tomorrow I will go look at one of those fantastic Monte Carlo Nascar editions.........because they win races!!

My whole point on the 280Z comparison was that there was way too much varnish and residue in the top end of the motor...especially when the oil was changed so often...and the other two cars looked great internally by comparison with alot of miles on them. The valve train was very clean and showed no sludge or residue on any of the parts. I am not, nor have I claimed to be a petroleum engineer....I was merely stating my personal observations.

What is YOUR basis for the comments you made in the defense of Quaker State products?
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Old 06-11-2003, 11:01 PM   #21
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Newsflash!

Racing motors are usually rebuilt after every race.
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Old 06-11-2003, 11:42 PM   #22
Sunrise City Rider
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Its a quality brand name oil...

Kenny Tran has run an entire season without touching his bottom end...

He's making over 900HP to the wheels...

Look, you want to say that Quaker State is garbage, fine...Thats your opinion...

You want to tell me that your 1978 circa motor is dirty with regular oil changes, fine...Thats what you observed...

SO, from your experience in the automotive world, you want to say which oil is greater than the others...

Zee

Oh and I still have under 10k miles on my motor so I'm using my waxy, gunky, sludge filled Pennzoil 20w50...

When I do reach 10k miles, I will change to my 1 quart of Lucas Oil Stabilizer and 3.5quarts of Mobil1 15w50...

Zee
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Old 06-12-2003, 12:57 AM   #23
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At no point did I say what oil was greater than others....I simply commented that my experience (I love repeating myself to stupid people) shoed a difference in the performance of the two brands I mentioned. As far as Quaker State and Pennzoil being the same company, that was a merger that occured in 1998...prior to that they were seperate companies.

As far as your obsession with Kenny Tran and his bottom end, do you really think he uses off the shelf Quaker State?

Since you only have 10k miles on your car, what has been your experience with driving cars that actually have some real mileage on them....preferably mileage you put there? I have a combined mileage of 313,000 on my 3 Subarus since 11/96......you remember, the year you could get a drivers permit...and this doesn't take into account the other 5 cars that left my possesion with high mileage and running well.

As far as the Mobil and the lucas, why use Lucas with a "name brand" oil like Mobil?
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Old 06-12-2003, 01:25 AM   #24
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seriously, who the hell cares.

I personally dont, you guys obviously both have opinions on what you like and arent going to change it. Just simply disregard what people say if they mention a few brands and one of them you think is crap then just look to use the other ones.

this was a good thread to start and very informative but lets try and get it back on topic.

cant we all just get along?

Ben
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Old 06-12-2003, 01:59 AM   #25
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what about chevron? i only use their gas, so i thought i woudl try out some of their oil. it seemed to do ok, just looking for some input. i run 15/30. but i am gona go back to reagular oil so not sure what i will run.
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