I've been running it in everything that moves for 20 plus years. Mowers, ATV's, 17 cars and light trucks, Motorcycle, Class 8 truck, you name it.

A couple of years ago though they discontinued 5w30 diesel-spec so I have had to switch back to gasoline-spec for winter use. Summer I have been using the 10-30 and 15-40, whatever is sitting on the shelf in the shop. I have a high performance street bike and there is no screwing around there with the bike crowd: the goto oil is Rotella 15-40.

As far as any sort of racing/recreation application, let me put it to you this way: if diesel-spec oil is good enough to run in a 15 liter engine pulling 100,000 plus pounds up 10% grades in 100 degree heat for 250 hour change intervals it can handle a few seconds of 1/4 mile abuse.

As far as the percieved need for Zinc content I'd rather not comment on it, as I just simply find it irrelavant knowing what diesel-spec oil is subjected to from personal experience: