Originally Posted By: OVERKILL
Originally Posted By: dlundblad
Originally Posted By: KL31
Originally Posted By: FZ1
Use the oil grade stamped on the oil fill cap as a starting point. The oil is too thick for your app at 10 degrees.
Pretty sure the RS specs 5W-50 motorcraft oil as it's fill. 5W can pump at -30 celsius though. 10F is what, like minus 10-15 Celsius? Not cold enough to stop it pumping. And that's assuming the oil temp is same as outdoor temp, which it wouldn't be unless he parks an RS on the street/snow overnight....
EDIT: and for everyone saying it's too thick. Ford are assuming this car will be tracked and from people I know who've test driven them, they are indeed a track car. For daily commutes, the ST is probably a much better option, unless you can somehow resist the urge to put that pedal down. 5W50 does shear down more from the UOA's I've seen, but I wouldn't go throwing a resource conserving 30 grade in one of these engines. I'd stick to the factory fill or a very stout 40 grade.
The RS is just a tad faster than the SHO, which is a family sized sedan. The SHO spec's a 5w30. Like I said, I would check to see whether or not the manual allows for a thinner oil. Realistically, 5w50 isn't required for Cars 'n Coffee meets, DD etc.
Doesn't it seem strange OP questions this with 0*F weather?
The SHO is 104HP/L, the RS is 152HP/L, that's a rather massive difference and certainly justification for a heavier lubricant.
I guess my point was that they are both DI twin turbo. The RS is certainly more dense you put.
If the environment calls for a 5w50, go for it, but for DD purposes I am failing to see the point and don't get why Ford didn't give a 5w30 option.
Once again, the fact that this was brought up in unusually cold temps has to mean something.
Originally Posted By: dlundblad
Originally Posted By: KL31
Originally Posted By: FZ1
Use the oil grade stamped on the oil fill cap as a starting point. The oil is too thick for your app at 10 degrees.
Pretty sure the RS specs 5W-50 motorcraft oil as it's fill. 5W can pump at -30 celsius though. 10F is what, like minus 10-15 Celsius? Not cold enough to stop it pumping. And that's assuming the oil temp is same as outdoor temp, which it wouldn't be unless he parks an RS on the street/snow overnight....
EDIT: and for everyone saying it's too thick. Ford are assuming this car will be tracked and from people I know who've test driven them, they are indeed a track car. For daily commutes, the ST is probably a much better option, unless you can somehow resist the urge to put that pedal down. 5W50 does shear down more from the UOA's I've seen, but I wouldn't go throwing a resource conserving 30 grade in one of these engines. I'd stick to the factory fill or a very stout 40 grade.
The RS is just a tad faster than the SHO, which is a family sized sedan. The SHO spec's a 5w30. Like I said, I would check to see whether or not the manual allows for a thinner oil. Realistically, 5w50 isn't required for Cars 'n Coffee meets, DD etc.
Doesn't it seem strange OP questions this with 0*F weather?
The SHO is 104HP/L, the RS is 152HP/L, that's a rather massive difference and certainly justification for a heavier lubricant.
I guess my point was that they are both DI twin turbo. The RS is certainly more dense you put.
If the environment calls for a 5w50, go for it, but for DD purposes I am failing to see the point and don't get why Ford didn't give a 5w30 option.
Once again, the fact that this was brought up in unusually cold temps has to mean something.
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