I also converted. To much data shows Rotella holds up better and goes for $23 per gallonI use Rotella T6 Synthetic 5W-40 which is readily available from most automotive supply stores and even Amazon. Would suggest a Motorcraft or the identical Mann filter, not the Fram.
Would you explain this please?How long with MoTo keep this 3rd blend as the original 5w50 recommended for the Fgt is long gone.
Don’t blame Ford for this one. It was the EPA’s doing by removing the ZDDP so to “reduce” catalytic converter fowling. Yea… Ford engineering was surprised as well and reran several engine tests to make sure the “B” version without the ZDDP was still acceptable for our engine’s durability. Original oil was black top bottle (WSS-M2C931-A) while the second release for both the GT and GT500 was gold cap (WSS-M2C931-B).Cars first came out with "A" spec for the FGT and gold top bottles I believe. Same time a black top bottle "B" spec was released for the GT500. First step, A was discontinued ~6 yrs ago, we all ran the B, black top. Now as Beach posted the B has been changed....
Again Mike, this was mandated by the EPA. Our government at work for us. I don’t like it either. Do you run the ZDDP additive with the Rotella in the GT? I plan on continuing to use the Motorcraft oil whether “better” than others or not. My oil changes are usually dictated by time not mileage and rarely if ever get close to 3K miles per change, so is viscosity breakdown really a problem with this short interval. In my opinion, not really.…but I don't like the degrading or re-rating and I have also chosen to run Rotella in the stroked Mach 1, 65 vette w ZDDP additive and the 73 Eldo as other "experts" for the other cars the majority of them also run Rotella.
The 5W50 motorcraft is THINNER than the 5W40 Rotella in less than 1000 miles. Its down to a 30wt by 2000. This is why many of us will not use the newer Motorcraft. Its only a 5W50 when new in the bottle, not in use. Of course if you don't drive the car, it does not matter much.
RedLine makes a great real 5W50 that does not break down, turns out its too thick for the DOHC motors.