Hi All, New to me mint 2012 Boss 302 with less than 5k miles. It came with [Carfax] service records; original owner religiously had it serviced at the Ford dealer every 6 months for 13 years! BUT, the records are pretty vague, other than O&F I no idea if the Trans/diff/brake fluid is new or 13 years old... So, I am going to change them.
The '12-'13 Boss 302's were a limited production track oriented Mustang with a higher performance 5.0 but the standard Getrag MT-82 manual trans (NOT the Tremec found in the GT-350/500's). Research shows factory fill was a medium weight MTF with an additive, then a TSB addressing cold shifting problems had it removed for a DCTF. Ford's lubrication charts have been changed to spec "DCTF". I see a-lot of track HPDE guys using various lighter side MTFs but also warnings and stories of these not properly lubricating when cold, leading to early failure.
I have decided to use a DCTF. Question is which one? I am leaning Motul, but not sure if the "Multi DCTF" (That goes back to the early '10s) or the "High Torque DCTF" that seems to have come out in the last few years. The Multi is specifically mentioned in use by many and the spec sheet says "also suitable for some mechanical gearboxes requiring gear oil with very low viscosity grade at low temperature such as SAE 75W." Motul sheet on the High Torque does not include this verbiage but is clearly full synth with esters and such. Specs of the High Torque falling in between the Multi and Ford.
Notes: $ is not really a factor, they are close in price and less than 3 qts are needed. I will only drive this car a few thousand miles a year and it will hibernate all winter. Hopes are to do a performance driving course next year. (I'd be ok changing the fluid before/after when that time comes).
Motul Multi DCTF
Motul High Torque DCTF
Ford XT-11-QDC (by Castrol)
The '12-'13 Boss 302's were a limited production track oriented Mustang with a higher performance 5.0 but the standard Getrag MT-82 manual trans (NOT the Tremec found in the GT-350/500's). Research shows factory fill was a medium weight MTF with an additive, then a TSB addressing cold shifting problems had it removed for a DCTF. Ford's lubrication charts have been changed to spec "DCTF". I see a-lot of track HPDE guys using various lighter side MTFs but also warnings and stories of these not properly lubricating when cold, leading to early failure.
I have decided to use a DCTF. Question is which one? I am leaning Motul, but not sure if the "Multi DCTF" (That goes back to the early '10s) or the "High Torque DCTF" that seems to have come out in the last few years. The Multi is specifically mentioned in use by many and the spec sheet says "also suitable for some mechanical gearboxes requiring gear oil with very low viscosity grade at low temperature such as SAE 75W." Motul sheet on the High Torque does not include this verbiage but is clearly full synth with esters and such. Specs of the High Torque falling in between the Multi and Ford.
Notes: $ is not really a factor, they are close in price and less than 3 qts are needed. I will only drive this car a few thousand miles a year and it will hibernate all winter. Hopes are to do a performance driving course next year. (I'd be ok changing the fluid before/after when that time comes).
Motul Multi DCTF
Viscosity at 40C (104F): 34.7 mm/s
VIscosity at 100C (212F): 7.1 mm/s
Motul High Torque DCTF
Viscosity at 40c (104f): 33.2 mm/s
Viscosity at 100c (212f): 6.5 mm/s
Ford XT-11-QDC (by Castrol)
Viscosity at 40C (104F): 32.2 mm/s
VIscosity at 100C (212F): 6.3 mm/s
