Anyone have any experience with the 0w30 Chevron Delo 400 HDEO? Bruce381? I downloaded the specs and it looks interesting. If it's no outrageously expensive, I might try some in my winter tractor.. which has to start without being plugged in. For the first time, this winter, it didn't! The cold-depleted battery just didn't have the juice to spin it over with 15w40 (had to use ether to lite her off... eeek! and it just barely worked). I may also go the Rotella 5W-40 route, but I'd like to explore the Delo more too.