Here is a copy of a post I wrote a couple weeks ago. I should say now that the temps have dropped I do idle the truck about a minute before I take off the first thing in the morning. About $10.50 gal.
I have been using wally 30w for a couple years in my wore out 216 with good results. It is apparently for older Detroit diesels as it says on the jug not to use in newer vehicles, I think it says only for farm and construction use. I bought a couple gallons a couple weeks ago, if it is important to you I can look on the jug. Also EdPruss, it is always located away from other motor oil, it is over by 2 cycle and gear or hydraulic type oils. If I had known there was going to be a test I wold have paid more attention. Maybe Ill see if I can get some more tomorrow.
Product details
Maintain your off highway vehicle's engine in higher temperatures and keep it running cleaner for longer with SuperTech Heavy Duty SAE 30 Motor Oil. Engineered for 2-stroke off road diesel fleet and farm engines, and some 4-storke gasoline engines subjected to severe use in varying climate conditions. Compatible with most standard and synthetic oils, this heavy-duty motor oil will help protect your vehicle's engine against harmful deposits and acids and ensure it runs smoothly for a long time to come. Provides high oxidation stability, extreme pressure anti-wear protection against valve train wear and scuffing of highly loaded parts exposed to boundary lubrication. For use in high-temperature environments. Recommended for API CF-2 and CF/SG applications. Not intended for use in on highway vehicles.
Super Tech Conventional HD 30, 1 Gallon
I have taken the "not intended for highway use" to mean higher zinc for old camshafts, but that's just me.
