I only use this4 my diesel truck

I have been using 15w-40 Shell Rotella in my two Chevrolet farm trucks, a 2018 5.3L and a 2020 6.6L as soon as the factory warranty expires. Both trucks start fine in -15 degree Wisconsin winters. The real value is in 90+ degree summers when hauling hay from the field and hauling a skid steer for loading and unloading the 1,000 lb bales. This oil is far superior to the 0w-20 OEM OIL. I change oil and filters every 3,000-5,000 miles. BTW, I also use it in my older farm tractors. Excellent Product

[This review was collected as part of a promotion.] The product is exactly what my machine needed and the the 3 pack was convenient as it fit the quantity needed.

[This review was collected as part of a promotion.] Use Shell Rotella for every oil change. Seems to last longer than other brands.

[This review was collected as part of a promotion.] Great Product with high quality standards to uphold.

Needed 10W-30 API CK-4 for a new machine (It takes 17 GALLONS!) and this is the best price oil the meets the specs.

My 1979 Volvo 244 DL with 231000 km has been treated to Shell Rotella T4 10W30 since Sept. 7, 2019, odometer at 215477. The overhead cam/valve sound is quieter at 3000 R.P.M. on the 400 series highways at 100 km/h. The rear crankshaft oil seal has stopped seeping oil this year. I used to use synthetic oil. I can experience that Shell Rotella T4 10W30 oil really agrees with the 2.1 L, B21 A naturally aspirated gasoline engine. These are long-lived engines, and anything I can do to prolong its life is appreciated. Thanks, Shell engineers, for the extra protection of Z.D.D.P. for the camshaft lobes!

I was concerned when I heard shell discontinued production of Triple Protection Rotella. This is my second oil change with this oil and I run it for 5000-7000 miles. UOA show great additive packs and the wear metals in my samples have decreased since the change to T4. Great oil and a great company. I've been using Rotella since the Rotella-T days.

I have been running Rotella 15W-40 in my Mercedes 300 Turbodiesel for years. Unlike what the instructions say about a 5,000mi oil change, I change my oil every 3,000mi. The car now has 528,000mi on it without overhaul yet! I also use Rotella 15W-40 in a pickup with a 454 engine pulling a 11,000lb chorus trailer.