Most ford dealers don’t use 10w30, they use 5w40. The logic is people that buy these trucks are using them to tow, which ford wants 5w40. Unless someone buys a super duty to just drive around uses 10w30, which is not to smart to buy one just to drive around.
Plus people get mad enough at what a diesel LOF costs with bulk 10W30. So many times I hear people saying they have to wait until their next paycheck to pay for a service on their truck.
What’s funny is, most dealers don’t even carry or use 10w30. These trucks are made to work, therefore being stamped right on the cap for 5w40 extreme, 10w30 normal. These trucks don’t fall under normal. 10w30 is for fuel efficiency.Well, my work we have tons of Super duty F-250’s and our dealer tells a rotella 10w30.
This is just what our ford dealer here told us. One guy said 10w30 is fine in our climate.
I have 4 friends with F-250 diesels and one friend just bought F-350 dually. His dealer said don’t use 5w40 since you do all highway miles. Other farmer friends use 10w30 cause it’s easier to get at rural King. This is feedback I’m getting. Cheers
They come with 10w30 from factory, but once that’s dumped 15w40 goes back in. I know several owners of fuel transportation business, and grease removal business. The fuel transportation owner has 55 gallon drums of Delvac 15w40. He owns kenworth and Volvo tractors. The Volvo comes factory fill with rotella 10w30, kenworth comes factory fill with Delo 10w30. He resolves oil 15,000 miles with all Delvac 15w40 in both branded tractors. Talk to any over the road trucker and he will tell you they don’t run 10w30, they use 15w40
All diesel engines shear the oil down. It’s not just rotella that shears.
And many fuel economy minded fleets use 10W30. The main trucking company for Honda in Canada (Gibson) is 100% 10W30 for example. I wouldn't call it widespread but it quite common now. Chevron distributor I use is 30 ish % 10w30 for bulk oil delivery to diesel fleets. Small fleets and owner operators, ya, 15w40, but those folks are generally the last to try anything new and possibly better.
Well said - if a person would follow the UOA data, they would notice that 10W30's shear also - especially in the HEUI engines ........ some can almost drop to a 20 weight in 7500 miles. That said, some oils do shear more quickly than others. Some of my oil analyses show that some Mobil 5W40's are still in the 40W range at 7500 miles (barely, but "in is in").
