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2005 Grand Prix GT 100,000 mile tune up

i recommend an oil other than valvoline. the only exceptional oils are pennsoil, Mobil 1, and ESPECIALLY royal purple. royal purple is the best oil on the planet. valvoline is nasty, hold it up to the light and look at all the junk in it.
 


L36pro said:
yeah... oil analysis. and royal purple has been proven time and time and time again.
Click to expand...

Oil's oil kid.

You should know that since you work at the Zone.

Will you do us all a favor and stop giving bad info?

Also...any oil will look crappy if you "hold it up to a light after being used"...that's ****ing ignorant wording.

FWIW to the OP, I run Valvoline in my GTP. VR1 Racing Oil. The extra Zinc is great for all the bearings in your motor.

YouTube - Big Cam GTP Idle & Rev

I've been happy so far with it ;)
 
ooooohhhh you run vr1 ok, so you really dont know anything about oil. vr1 is way too heavy for the engine.
 


And 20W50 is used in TONS of motors with very large cam builds that idle low that need that bump in oil pressure...anything else?
 
in engines with very large cams that need the bump in oil pressure and can handle that weight oil in their system...... fail
 


Lulz.

Cause I'd actually have to side with L36pro on this one.

The stock oiling system sucks.

Guy who runs sinister drag designs has done more. Some info on it on 3800pro.
 
i just know that 20w50 wont work in an L36/ ive got 5 quarts of it and an ac delco filter sitting at the foot of my bed. ill put it in my 7.6L sometime.
 
Care to share why it won't work?

Oil's oil...guy.

Maybe you need to go back to the training classes so you can learn WITT again.
 


it will work. but it could very well blow up your pump.
and oil isnt oil, ever do any bearing tests on different brands?
 
Wow...I come back to check this thread on Monday (after being gone since Friday) and it has turned into so much FAIL!!! This is the first time I've ever seen anyone utter the words that Penzoil (misspelled in the original post) was an "exceptional" oil...:th_shakinghead1:...Now I have nothing against Penzoil and have used it in the past but exceptional?? Someone gotz to get off the reefer.....
 
well i dont study the penzoil package, but through basic common sense i can come to the conclusion that penn state oil should be spelled pennzoil. zoil being used because pen-soil doesnt look right.
 
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