Re: WRX change to Synthetic Oil...Opinions??

Synthetics aren't really needed.

> > But you do need them if you have a rear spoiler and go faster stripes, they > all work as a team. ;) >

dont forget the super phat exaust pipes

Reply to
Michael P. Smith
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Reply to
Edward Hayes

Synthetics are superior in hot and cold climates. We have $20-30,000 + cars and we worry about a few dollars the synthetics cost more than the dino oils.

Reply to
Jerre Bassler

Although Synthetics cost more, your change intervals can be increased to 7-10k miles quite easily with maybe some oil top offs needed due to normal oil consumption. Some have gone to 15k (based on good results from oil analysis) with only a filter change at 7-8k miles. Even so, Sythetics will cost you more but how much is piece of mind worth?

CW

Reply to
CW

Most synthetic are thinner than recommended by subaru. Eg (5-50 compared with the recommended 10-30) If you ask most bearing experts they will tell you that synthetics are only better than dino oil at extreme heat and extreme cold. So they are good in very cold conditions ( zub zero winters) or VERY hot summers. The disadvantage is that the thinner oil will leek though seal that the recommended oil wouldn't. this is partularly true with tubos. The result is oil cosumption and an oil coated intercooler core.

Mike

Reply to
MIKE

How do you figure. A 5W30 dino is different from a 5W30 synthetic? And synthetics leak through seals? Maybe if dino oil molecules were way way bigger. Kinda like blood cells vs water molecules? I've used synthetics with no ill effects. I agree, you'll be fine with dino oil unless you're living in extreme temp areas like I do.

Reply to
tom

You are right there is no viscosity difference between A 5W30 dino and 5W30 synthetic roughly speaking. But here in NZ at least all synthetics that i've see are 5w50, or 0w50. these oils are too thin at normal operating temperatures. note reccommended oils are 10w30 (normal conditions) or 5w30 (Cold Conditions)

Mike

Reply to
MIKE

To start with I do not know of any car company that recomends a 50w oil. You say a a 5w-50 is thinner than a 10w-30 at normal temps?? The 50 weight would be heavier and only thinner in the cold 5w. I know that Amsoil outperforms other oils in the Four-ball wear test (ASTM D4172) 60 kg pressure @ 150 degree C, 1800 rpm for 1 hour duration test. Amsoil 0w-30 had a 0.374 wear scar, Mobil 1 SuperSyn 5w-30 a

0.667 wear scar, Pennzoil 5w-30 w/purebase a 0.848, Quaker State 4x4 10w-30 blend 1.497. Dino oils are worse yet. Better protection at normal temps a benefit of a good synthetic oils like Amsoil.
Reply to
Jerre Bassler

Check. Fortunately we can get 5W30 synthetics readily here in the US.

Reply to
tom

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