Yeah and Ford also recommends crazy intervals on the transmission , rear diff. and other fluids . His truck his money .
Ok I'm sorry , my Ford truck is 7,500 . It's a HD so I guess there different .That's not what you said. You said he was exceeding the manufacturers recommendation. Fords recommendation is to follow the IOLM to a maximum of 10,000 mi or 12 months unless you fail to reset the IOLM or accidentally reset it.
He likely wants a certified oil in which case I don't see rebottled Kendall as an upgrade over M1 EP.
I believe only their Professional Series is rebadged Kendall:Well, GT-1 full synthetic could handle it too. If RL has changed formulation that much, then it was a sad day when they sold out.
Would you be kind enough to explain how M1 EP would be overkill? What, BTW, is your definition of overkill for an oil choice?M1 EP. A little overkill for the application in case the cylinder deactivation causes issues with oil life we haven't seen on older models. Especially since you lost a quart of oil capacity.
Would you be kind enough to explain how M1 EP would be overkill? What, BTW, is your definition of overkill for an oil choice?