Hello
I have a 1984 B7200, I was getting ready to do an oil change.
My question is, should I use 10w-30w, or the newer 15w-40w Heavy Duty Valvoline for diesels? I believe the Valvoline 15w - 40w wasn't around in 1984. Oh yeah my outside temp's range from
9 degrees (low) - 112 degrees (high). Any help would be appreciated.
I have a 1984 B7200, I was getting ready to do an oil change.
My question is, should I use 10w-30w, or the newer 15w-40w Heavy Duty Valvoline for diesels? I believe the Valvoline 15w - 40w wasn't around in 1984. Oh yeah my outside temp's range from
9 degrees (low) - 112 degrees (high). Any help would be appreciated.
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