Thomas, I know you can get Rotella T in various weights including 10/30. You probably will have to order it from your local auto parts store. Not sure about Delvac weights but look on their website and see if they offer that weight. A lot of new tractors now require 10/30 diesel oil over 15/40. If you have a coop near to you go take a look and see what they have.
I have checked Mobile's website before and was looking around on this site to find a place that sold the 10w-30. I go to school in SE Wisconsin, so finding some farm supply place shouldn't be too hard.
You could use the Valvoline Racing 10w-30 for 2 bucks a quart .
Heavy doses of calcium and magnesium in that one . TBN of 12 as well .
VERY streetable and friction modified. No DRY sounding engine with this oil and easy to find .All NAPA's have it . Here's what it looks like .
[email protected] 40c 74
[email protected] 100c 11.5
vi index 150
TBN 12 !
[ February 23, 2004, 09:56 AM: Message edited by: Motorbike ]