Hi All,
A newby seeking some advice. I'm trying to green-light a list of (3) or so "good to great" (but does not have to be "best") differential fluids for my 2018 F-150 diff fluid selection. My F150 is unladen 90% of its life and 10% of the time at 14,000 lbs gross combined weight (i.e., towing 9000 lbs). I want my plan to have a reasonable chance of bringing my differentials to 250,000 miles.
Notes:
The official spec for both front and rear is "Motorcraft® SAE 75W-85 Premium Synthetic Hypoid Gear Lubricant XY-75W85-QL with specification WSS-M2C942-A", but the issue is that 75W-85 is hard to find and Ford's offering is expensive at $25/quart on amazon. My F150 has calls for Hypoid gear lubricant, has a rear electronic locker, and so far as I know, does not ask for friction modifiers since it lacks a limited slip design.
My plan:
My tentative list of green-lighted fluids:
A newby seeking some advice. I'm trying to green-light a list of (3) or so "good to great" (but does not have to be "best") differential fluids for my 2018 F-150 diff fluid selection. My F150 is unladen 90% of its life and 10% of the time at 14,000 lbs gross combined weight (i.e., towing 9000 lbs). I want my plan to have a reasonable chance of bringing my differentials to 250,000 miles.
Notes:
The official spec for both front and rear is "Motorcraft® SAE 75W-85 Premium Synthetic Hypoid Gear Lubricant XY-75W85-QL with specification WSS-M2C942-A", but the issue is that 75W-85 is hard to find and Ford's offering is expensive at $25/quart on amazon. My F150 has calls for Hypoid gear lubricant, has a rear electronic locker, and so far as I know, does not ask for friction modifiers since it lacks a limited slip design.
My plan:
- A 75W-85 or 75W-90 full synthetic that meets or exceeds GL-5
- Replace said fluid every 75000 miles
My tentative list of green-lighted fluids:
- Mobil 1â„¢ Synthetic Gear Lube LS (downside, slightly "wrong" viscosity spec)
- Redline 75W85 GL-5 Gear Oil (downside, has friction modifiers but my axle doesn't call for them)
- Redline 75W90 GL-5 Gear Oil (downside, has friction modifiers but my axle doesn't call for them)
- Lucas Oil Synthetic SAE 75W-90 Gear Oil (downside, slightly "wrong" viscosity spec)
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