Whats your Choice of engine Oil?

[NOVA]

What type of engine oil are you guys using? I have been running Castrol and Valvoline in the past, just curious what everyone uses these days.

[Steve1968LS2]

I run Torco right now.. but I've ran both Red Line and Royal Purple..

The Torco SR1 is killer.. expensive but very good stuff.

[jcal87]

Royal purple

[GregWeld]

Delo 400 -- 15/40

NOT the LE junk

It has all the zinc and the good stuff in it.

[monza]

feeling ghetto after the first few posts... Mobil One Synthetic.

and now actively googling oils.

[Steve1968LS2]

Originally Posted by monza

feeling ghetto after the first few posts... Mobil One Synthetic.

and now actively googling oils.

I don't like modern Mobil 1... they took out a ton of the good stuff to meet new guidlines intended for modern cars with cats..

I run Mobil 1 in my truck.. but I want all those evil lubicants in my Camaro, so I run stuff like Torco (which would be bad to run in my truck)

[GregWeld]

After a long and very detailed discussion with the man that owns Pure Power (they sell cleanable filters - and fancy oil)... He convinced me to run the Delo 400 (Diesel oil) 15/40.... and here is a brief (sort of) distillation (like the oil pun??LOL) for some of the reasons I choose to run this stuff... in my twin diesel boat - my diesel truck - and my cars (except the BMW which gets Mobil synthetic 0/60).

Commercial (Diesel) Oil

The additive packages for C (commercial) certification are designed to promote engine life. The additive packages for C rated oils contain extra buffers and detergents to keep the engine clean and free of acids. C rated oils are far better than S oils at holding and dispersing combustion byproducts and other contaminants, and at not becoming acidic. Traditionally these oils are primarily used in diesel motors, which are very expensive and are expected to last a million miles or more. When an engine rebuild costs $10,000 - $15,000 and puts you out of work for a week or three, you don't mind paying a bit more for your oil. The C certification tests have been largely developed by Mack, Caterpillar, Detroit and Cummins to provide the additives necessary to keep these engines running a long time. The latest commercial certification is CI-4 Plus, which includes extra protection for high temperature high revving motors. Since it's designed for diesel motors, they don't care about no stinkin' catalytic thingies, and CAFE is a place where you get a cup of joe and a donut. CI-4 Plus differs from CI-4 with higher detergent requirements and better sheer stability. The shear stability is exactly what motorcycles need due to running the engine oil through the transmission.

Although C standards are changed every few years, the older standards are enhanced, not superceded. So, newer higher rated C oils are simply better than older lower rated oils.

Although few car owners test their oil regularly, most large trucking companies routinely do oil analysis on their diesel trucks. Used oils are checked for viscosity breakdown, for detergent and dispersant function, and for metal contamination that would indicate engine wear. C oils that don't measure up are quickly run off the market place. To prevent engine wear, the best strategy is to keep deposits off the pistons, rings, and bearings. Therefore, diesel oils typically contain half again more detergents, double the dispersants, and a much more expensive and robust VII package than S type oils. If you go to an auto parts store, convenience store, or grocery store, you'll see that there are dozens of brands of automotive oils, all claiming to be the best. If you look at truck stops, you'll see there are only a very few diesel oils sold, typically Rotella, Delo, and Delvac. Trucking companies find what works for them and won't switch. They're not interested in saving a dollar a gallon on some unknown oil.

[rwhite692]

Shell Rotella T full synth in the diesel truck, Mobil one (full synth) in everything else.

[lil427z]

i use amsoil. first rait oil.
rick k

[89 RS]

Royal Purple in the Camaro, Mobil 1 Full Synthetic in my truck/wife's car.