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Old 12-03-2001, 10:25 PM   #1
Bottom Feeder
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Question Just put in Castrol Syntec Blend...

I changed my oil a little while ago, draining out Mobil 1 and filling it with Syntec Blend, both in 5w-30. I don't know if it means anything, but my car is quieter now, kinda sounding 'more lubricated'. The all-synthetic Mobil wasn't even that old or dirty, so I don't know why the motor would sound better, especially under acceleration. Hmm...
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Old 12-03-2001, 10:36 PM   #2
hkwan
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See if you can report back some MPG # in a few weeks. That's one good way to tell if the oil is doing anything differently comparing to whatever you were using.

Thanks,
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Old 12-03-2001, 11:03 PM   #3
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I would, but I don't keep track of the MPG around town anymore, so I don't have hard numbers to compare. Maybe the next time I drive back home to New York I will. This thing gets in the low 30's on a trip like that- not bad!
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Old 12-04-2001, 01:15 AM   #4
inpreza kid
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i've used both mobil 1 and castrol syntec. both very good oils. i even tried the syntec 5w50 once. didn't really notice a gas mileage difference. all the same to me.
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Old 12-04-2001, 10:11 AM   #5
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Default So?

Any time you put in fresh oil, you will notice your engine running smoother. Even if you change from Mobil 1 to some no-name $0.60/qt stuff. Try changing back to Mobil 1 in another few kmiles and you'll notice the difference again. Mobil 1 is still superior.
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Old 12-04-2001, 06:01 PM   #6
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Sure, but I wouldn't have bothered posting this if it wasn't a strangely significant difference, would I? Thanks for the tip.
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Old 12-05-2001, 02:57 PM   #7
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I use Castrol Drive Hard 20w-50 in my RS. My car runs really nice and quiet. It's not cause it's a much thicker oil is it??
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Old 12-06-2001, 01:03 PM   #8
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AWDBOY: Yes, it could be the thicker oil. Thicker oil fills up large clearances better than thinner oil. I suppose it's OK for you to use thicker oil in the winter since you live in CA.

--
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Old 12-06-2001, 08:16 PM   #9
potenzaus
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Default Castrol SLX

Do we have that here in the U.S.? According to my friend in Sydney that's the best engine oil (he's got a WRX)...
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Old 12-06-2001, 10:19 PM   #10
Richard L.
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potenzaus: I don't think you can get Castrol SLX here in the U.S. I don't see it on Castrol's Website. It's probably the same formulation as Castrol GTX. Everybody has an opinion. The best engine oil to your friend might be the worst engine oil to someone else. Just do your own research and gather your own data.

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Old 12-07-2001, 04:00 PM   #11
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Lightbulb

Castrol SLX is a synthetic so the closest we have to it is Castrol Syntec, not GTX.

Dennis
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Old 12-07-2001, 04:54 PM   #12
Richard L.
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Oops. My bad. I just found the link to it: http://www.castrol.com/products/cars_slx.html

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Old 12-11-2001, 10:28 AM   #13
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Also, Syntec Blend is probably thicker at higher temps than
Mobil 1. If you look at the manufacturer spec sheets, you'll see that even 5W30 GTX has a thicker viscosity at 100 dec. C than Syntec Blend or Syntec. Must be the parrafin wax that makes it thicker.
Why would you go from a synthetic to a blend anyway? Especially in the winter. If you want Castrol synthetic, use Syntec.

-Dennis
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Old 12-12-2001, 10:55 PM   #14
chileewili
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Thumbs up I used to put my trust in Mobil 1....

I'm a firm believer in synthetic fluids (dont forget tranny and diffs too). The main thing about synthetics is that they dont break down like conventional oils. I used to put in Mobil 1 everytime the fluids needed to go, but my brother convinced me to switch to Amsoil. Now I know that people will say it's all psychological when they notice a difference in performance when they change oil, and i mostly agree. but it's not psychological when they disassemble a motor and find minimal wear after 600K miles. and something like 400K on 1 oil change. -okay, this guy drives a diesel, and yes they generally last longer, and yes, this guy used a twin filter, 1 to get rid of the solids, and 1 for the water, and yes this guy used an oil analyzer to let him know the condition, but bottom line, it's still Amsoil motor oil he used. check it out on their website (pretty low budget, but it = less money spent on marketing and more on product.) here's some stuff i remember i saw on their site.....
something like Mobil was pushing/marketing their mobil 1 to the consumer with the 'special tri-synthetic blend' in the mid 90's. Amsoil counters by stating that they developed multi based oils like that and actually stopped using that outdated (dont know if it's the exact words, but same connotation) formula over 20 years ago. ohyea, these guys were the guys who first started synthetics for cars, they developed their oils from research for jet turbines. pretty cool stuff.
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Old 12-12-2001, 11:00 PM   #15
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Default ohyea....

ohyea, i dont recommend Castrol Syntec to my friends because it's not a truely synthetic formula. it's actually a derivative of mineral oil that's been put through a 'special', and i'm sure 'patented' process. (a bunch of garbage if u ask me) it costs the same as mobil1 and amsoil per quart, but is not a true synthetic?? where's all the extra money go to? the patent office or their marketing department?

ohyea, and who cares if it's 5-50w, just choose an oil for the climate in which u live. your not going to keep oil in the motor for an entire year anyways.
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Old 12-13-2001, 01:11 PM   #16
Richard L.
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Here is Castrol's Position on its Syntec: http://www.pecuniary.com/newsletters...csdefined.html

Here is Castrol's Settlement: http://www.ftc.gov/opa/1999/9909/shellcastrol.htm

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Old 12-15-2001, 11:01 PM   #17
chileewili
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Thumbs up

great link on the Syntec, Richard L. I knew I wasn't dreaming when I heard that Syntec wasn't 'synthetic'.

-GO AMSOIL!!
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