Oil grade opinion please.
 

Hello, I have WORKS Stage 2 turbo kit, oil cooler, and running e85 flex-fuel kit.
I was told by WORKS to use 5w-30 instead of 0w-20 for engine oil. WORKS used ENEOS 5w-30 and the car seems to be running good for few months now. They told me I can use any synthetic brand as long as 5w-30.

Now its time for my first oil change since the turbo and I want to switch to Amsoil (based on many good reviews about them). I called a local Amsoil dealer and they told me to use 0w-20 and not 5w-30 because it will just create extra heat and may not perform as well as running 0w-20s. He said their oils are not like many other brands and are made to not break down during heavy driving and high temps.

I daily drive my car and do some spirited driving up/down mountain roads. I am not tracking my car but probably one day i might.

Can someone with more experience point me in the right direction? Thanks

your boosted and in CA. Stick with 5w-30.
Use motul

Run a quality synthetic 5w-30 from any brand you like.

I run Mobil 1 5w-30. It hasn't let me down yet!

As long as your oil temperature is kept in check (by an oil cooler), there's no reason to switch to a heavier oil. For whatever it's worth, I've been using either Motul or Amsoil 0w20 in my engine for about 45000 turbocharged miles (also with the Works kit) and a proper oil cooler. I haven't seen oil temperatures over ~190 while driving even in 90+ degree heat and I'm making (and using) close to 400 whp.

Run 0w20 on a turbo and youll blow your shit up. All boosted subis run 5w30 and never seen a boosted car run 0w20. I have see alot of QQ people running 0w20 and blow there shit up though.

I've ran 5w-30 for over two years boosted at 500+ whp, still running strong.

Yes, I've heard many stories of boosted frs/brz blowing their motor when running 0-20. Don't know the details of reason why, it could be numerous reasons. Some saying 0-20 if I have proper cooling which i do have oil cooler. And some say do not run 0-20. lol

Works do recommend 5-30 though.

Turbo's kill and break down the 0w20 oil as it passes through the Turbo. I don't care what the temp of the engine is but once oil gets to hot and breaks down its never the same, It needs to be replaced because it's properties is no longer valid.

You can look at any... turbo'd car on the market and you'll never see anyone running 0w20. I personally use the same exacted oil as the Forester XT or WRX uses from Subaru with there ej20, ej25 and fa20 turbo's engines. I also use the same oil/water block to bring the oil up to temp super fast and maintains the oil at the perfect temp for street use.

This summer has been super shitty at 100f and I was super close to dropping 5w40 in the car.

0w20 for NA cars is fine it heats up quickly. No 1000f turbo is heating of the oil.

If you have the money to rebuild your motor by not taking the advice from you turbo kit manufacture then go for it. It's kinda of fun to use the search on the forums and look at all the people who would go over and over about using 0w20 and then don't have any problems and BOOM one day they post a new thread "OH noes my motor spit out a rod!".

Also noted Subaru recommends oil changes every 3000 miles, which is way cheaper than a new motor & your time. Oils cheap, Engines aren't.
:burnrubber:

My first intention was to go with WORKS recommendation. If you read the post it was the AMSOIL oil adviser that told me to run 0-20.

Its good to hear some useful advice from this forum. The AMSOIL adviser went kinda nuts at me over the phone and saying that mechanics do not know oil and that AMSOIL does not break down like other oils, and also running 5-30 will just create the extra heat.

Maybe I probably change my mind go with a different brand.

No i run AMSOIL all my Suzuki GSXR's. Its great, i personally should run the 5w30 in my car.

Why do you have to shit-post everywhere

Yeah sometimes when he interjects I shake my head, then I look at his picture and see what looks like a confused bloke, consistent with some of his posts. He is polite though, most Brits are except, after the pub LOL

Motul 5w-30 to 40 for boosted fa20's