Engine oil AMSOIL or OEM Volkswagen

I use amsoil in my trans am. Never had a bad experience with any oil but everyone seems to love amsoil so figured it couldn't hurt. Especially with an engine that makes some power.

Just finally did my yearly oil change on my old faithful 04 wrx 177k miles last week. Put 14,370 miles on the signature series 0w40. Oil sample got in today. 31% oil life. Very little brass, relative clean oil. Waiting for my rod bearings to die but if this keeps up they might last a bit longer! Keep in mind I was using amsoils 25k mile oil filter aswell.

0w40 signature series amsoil. Went 9100 miles of hard, extremely hard miles 73% oil life remaining. Filter changes every 5k. Use it in all my turbo cars now.

I've changed my TDI's oil every 10K miles since it was new. It currently has 330K miles on it and runs like a watch.

A rotary engine builder in my city with 30 years experience absolutely swears by Amsoil XL 5w30. So that's what I use in my RX8 now.

For example- my turbo used to rattle just for a second upon startup, I always thought this was just because the oil drained out and the pressure needed a sec to catch up when starting - but with the Amsoil its whisper quiet - almost like it creates a film and stays there ready for the next start. There's a few other minor good things about this oil that I've noticed - that's just one of them. Really highly impressed with Amsoil.

Amsoil dominator 15w50 Cold (15c ambient) start up pressure = ~70psi Warm (200f) idle pressure = ~35psi Max hot (~270f) pressure @ 5th gear WOT = ~87psi and it holds steady Cruising on the highway (220f @ ~3k RPM) I see ~65-70psi Everything is well within factory spec with added protection, less consumption, proper flow, and better high heat retention. I'm gonna stick with Amsoil for a while.

I ran this for 200k and ways very happy with results. Had the oil tested twice in a lab and was happy with the results.

Amsoil 10-30 was my choice on my 200,000 mile 2001 jetta + i changed @ 10,000 usually 4 to 6 months. car was chipped etc, about 300 tq + 275 TQ with a KO-4 + APR tune etc.

AMS oil 5w40 "European Formula" after first 5k. Just dumped the first oil after 10k of hard driving. Still had lot's of life left in the oil, and no noticeable consumption as we recovered almost all of what was originally put in (4.4 of 4.5L)