. . . and have ever since reading about it here on this forum. You might notice slightly reduced MPG with Delo 15W-40; like most diesel formulations, it's kind of thick even at operating temp. I've heard it can be a problem with starting your car in a very cold climate, but apparently it's fine down to 15 degrees F.

'm experimenting, however, with mixing it with some 5W-30 Havoline (from the same company, ChevronTexaco), to thin it out a little. Delo by itself is kind of thick for a 4-cylinder engine, and I'm trying to eke out all the gas mileage I can.

Still, the majority of the oil in my M111 crankcase will be Delo400.

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-- Paul W. (The Benzadmiral)
('03 Buick Park Avenue, charcoal/cream)
Formerly:
'97 C230, smoke silver/parchment; '86 420SEL, anthracite/light grey; '84 280CE (W123), dark blue/palomino