quote:
Originally posted by 1sttruck:
I see more diesel pickups than other types of passenger vehicles, but maybe it's different in other parts of the country. Most of the current diesels in pickups seem to require CI-4 or CI-4+ oil, which is very different than car oils. Most of the diesels in pickups have large sumps compared to most cars, My Cummins needs about 12 qts for an oil change, and although the newer models have a 7500 oil change interval mine is 3750 miles. Using a PCMO would void warranty and just be plain dumb as they don't have the detergents, soot carrying capability, and anti-wear protection that a HDEO has.
from another thread...
Maybe the cars are different, but the turbo diesel trucks can get EGTs (exhaust gas temperatures) high enough to do damage, like melting pistons. In general people seem to suggest keeping EGTs below 1250 deg F to 1350 deg, and one of the first upgrades is to get an EGT gauge. Some of the high output stock trucks can get close to that when pulling heavy loads up grades, especially with altitude. They can get hot enough that Cummins suggests letting it idle a bit before shutting down after sustained loads, as diesels cool when idling.