Hi...

Don't know a whole lot about fixing my 83 Mercedes 300D. I do change the
fuel filters when it's getting dirty, check the oil, etc...
I'm going to order oil from Walmart, and I've looked at the best Diesel oils,
They have the Mobil Delvac 1300, a gallon for $12.47. Trying to be economical.
Does this stuff keep?, wondering if I should order one gallon or two, or three..
free shipping, and a competitive price point....
Thanks!
Lindajane