Originally Posted By: BrocLuno
Since regular conventional HDEO's can go up to 15,000 miles in big rigs, what are trying to do?
Note that Delo 400 15w40 is Iso-Syn technology, so that is technically able to be called syn in the USA...
We just changed two days ago to the Delo 400 15w40 in the son's gas 5.9L 2002 Dodge Ram 1500 that will need a quart to make it to 5K miles with 10w30 factory spec. It was on sale for $12.99 a gallon so we picked up a case. Not sure if we will use it this winter but we seldom see temps < 20F. The miles are at 131K.
