Best Engine Oil

[Pargolf]

Hey guys,

My engine is a straight six, 250 with high mileage. No leaks and does not burn any oil that I can detect. What kind of oil should I use for my first oil change as the new owner? Straight 30w? Thanks!

[Longhorn 70]

I like Rotella T from Shell. It is tough to find striaght 30 though. 20-50w would be good if you aren't in a super cold environ ment.

[NobleSix]

ive used rotella t with great success in my 292's. right now im using mobil super 5000 10w 30. im really considering going back to rotella t cause at operating temp i get about 25-30 psi idle and rotella was always in the 35-40's. i dont really drive her much during the winter time if i can help it.

[asolde]

I use Valvoline VR1 Racing oil SAE30 Motor oil. That's what my machinest told me to use in my 350's. Check it out it has the additives these old engines need.

[67 chevelle]

Originally Posted by Longhorn 70

I like Rotella T from Shell. It is tough to find striaght 30 though. 20-50w would be good if you aren't in a super cold environ ment.

thats it , if you have a flat tappet cam , this is what you want to run , joe gibbs makes some good stuff too , but im sure you will pay more for it

[leddzepp]

I've used Mobil One synthetic for years on all my vehicles. My 72 has a flat tappet cam so I use a zddp additive.

[RenoKeene]

VR-1 here also.

[twouvakind]

Hemmings(not cheap)http://blog.hemmings.com/index.php/2...-classic-cars/
There are some "high mileage" formulations at AZ, Walmart and Advanced(MaxLife, GTX etc.)

['68OrangeSunshine]

I use straight 30 weight in my 292. Sometimes I run 20W-50 weight -like in the winter - not that we've seen much of that in Tucson, this year.
In the 350 in my '71 GMC Jimmy, I use Valvoline SynPower 20W-50 year round.
If I have new old style oil, Service SL, I don't use additive, but if I'm using Service SM, I add a 16 Oz bottle of STP for the ZDDP.
If I could afford it I'd use Valvoline Racing 30.