Favorite Oil?
 

For the C4, whats your favorite synthetic oil?? Mobil 1, Pennzoil or Valvoline?

Mobil 1 hands down :thumbs:

My '90 was an L-98 car. (remember it was a big pile of parts) A small block Chevy does just fine on Castrol GTX. There is no need for synthetic with a quality oil. Now let the brow beating begin.

...just remember, Corvettes did fine on conventional oil for 40 years before they had synthetic. They also changed nothing inside the engine that made it a neccesity to run synthetic.

just my .02

Mobil 1 full synthetic 5w30, just like the manual recommends.

The L-98 is fine with dino oil, but at the temperatures the LT-engines run at, synthetic is cheap insurance (compared to a new engine...)

While I agree with you, some engines such as the LT1 run at pretty high temperatures and for that reason, I'd prefer to run a synthetic.

Synthetic is the way to go :thumbs: I run it in my ZR-1 & LS1 too!

Mobil 1
 

Mobil 1 5W30 - because it is what I was told to do by a higher authority.

What went in the crankcase from the factory-Mobil 1 synthetic. :cheers:

:eek: You been talking to my wife??? :)

Let me ask this question guys. What do your engines run at, temperature-wise? Mine runs at 180 degrees on a hot summer day. I'm asking because I honestly don't know, is this not normal for a C-4? I figure if the water temperature is normal, cylender head temp should be close as well. I'm just trying to gather info for future reference. Sorry to hi-jack the thread.

Currently - Havoline Premium 15W-40:yesnod:

ROYAL PURPLE next spring:thumbs:

On a normal 75* day, i'll be around 185* oil-temp. When it gets hot maybe up to 205*. But at the track 230* isn't uncommon, both AutoX and at the drag strip.

Mobil 1 like it says on the oil filler cap :thumbs:

Mobil 1 5W-30 every 3,000:thumbs:

:iagree:
Laura

Neither - Royal Purple.

Mobil 1 but I have used Redline.

Another Vote for Mobil 1 :cheers:

Mobil 1 in the 5-quart jug from Wal-Mart.

:cheers::iagree:

Amsoil, but I usually have to settle for Mobil-1