What is the best conventional oil out now? I have been using Castrol GTX 10w-30 in my 86 EFI 302 and it seems VERY happy. Is thier a BETTER oil that would make me happier.
Some choices are
Val All climate
Val max life
Castrol HM
Moble drive clean 5000/7500
Rotella T syn 5w-40-BUT I'm concerned about the cat with a diesel oil
Super tec
Super Tech syn
Pretty much ANY conventional oil with GREAT Numbers on paper
Dustin

 

well if your truck burns no oil a diesel oil will work fine.

my top choices are chevron/havoline outstanding numbers on paper and on voa's and uoa's
i would also use valvoline durablend

 

ford

do you know of Castrol Syntec Blend is as good as Valvoline Durablend?

 

No oil burning as far as I can tell. Clean tale pipe no oil in air box, clean plugs, Stick ALWAYS right on full.
What do you think Rotella T syn 5w 40?

 

No oil burning as far as I can tell. Clean tale pipe no oil in air box, clean plugs, Stick ALWAYS right on full.
What do you think Rotella T syn 5w 40?
How are it's paper numbers?

 

Whatever is on sale.

How fickled we are.

 

The one and only thing everyone will agree on is to change it frequently.

Personally, I stay away from the .94c value oil, I usually use Valvoline. people seem to like the castrol GTX.

I wouldn't change to any synthetic in such an old motor.

 

Personally, I stay away from the .94c value oil


yeah same here i hate that stuff








i buy the .49 chevron supreme when its on sale.

 

Well, my personal favorite is Mystik JT-8. I've done UOA's on it, and a VOA. See the following links:

https://www.ford-trucks.com/forums/s....php?&t=272533

https://www.ford-trucks.com/forums/s....php?&t=287358

https://www.ford-trucks.com/forums/s...d.php?t=258692

 

You mean the stuff at AutoZone? That is only SA rated and not suitable for cars newer than 1980. What I have seen says so on the bottle.

 

Rusty, you took the words out of my mouth. I once worked for Kerr-McGee before they sold their lubes business to Citgo. At the time, Mystik was considered a great oil. I'm glad to see that Citgo is keeping up the good work. I'm currently running synthetic but would go back to JT-8 if I went back to a conventional oil.

 

Texaco Havoline.

 

Havoline in all of mine except the old FEs- they get Mystik.

 

Valvoline!

 

I'll throw in for the Mystic too. I use it in all my gassers. Great oil and inexpensive. My second choice would be whatever is on sale.