Hey all..

I picked up a ton of chevron delo 400 SAE 30 oil for CHEAP. I was wondering what temps this oil could be run in? Summer only? Would a slantsix care?

If you were intent on using it, I would say only use it in the Summer.

This is from the 65 plymouth manual:

Multi-Grades
20w-40 where temperatures are consistently above 32F
10w-30 suitable for year long operation in many parts of the US; may be used where temperatures occasionally drop as low as -10F
5w-20 Recommended where minimum temperatures consistently are below 10F

Single Grades
30 Where temperatures consistently are above 32F
10w Where temperatures range between 32F and -10F

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

where are you? if in the frigid north, be careful...below the freeze line (like FLA, south TX, southern CA) use it year around.

sb