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Ask Mobil Archive -
Trucks
DateQuestionAnswer
08/30/2009
Clarify Confusion Over Which ATF to Use in Ford Trucks
Ford specifies Mercon for the automatic transmission in the F-150 Lightning. Also, Ford emphatically states (in bold) in the owner's manual and service manual never to use a transmission oil that meet...
When the Mercon V spec was originally issued, Ford did not want fluids that met both Mercon and Mercon V to be used in vehicles. That is no longer the case.  You can use any of these following product...
06/15/2009
Keeping Oil Pressure Up in a Chevy Truck
My daughter has a '98 Chevy 4x4 truck with 127,000 miles on it. After the oil gets hot, the oil pressure drops to around 20 lbs. She runs 5W-30. Short of rebuilding the engine, would it help to run hi...
It is not unusual for a higher mileage vehicle to run at lower oil pressure and this alone should not be of any concern. This is primarily due to larger clearances due to normal wear and tear. We reco...
04/27/2009
Is Mobil 1 15W-50 Okay to Use in a Ford F-150?
I purchased a 1992 F-150 with a 4.9 I-6. The vehicle has 143,000 miles on it and runs well. The service history shows oil changes that include the use of 10W-30, 5W-30, 10W-40 and 20W-50 but never syn...
In hot climates like south Texas, Mobil 1 15W-50 would be a great choice as it will provide the durability you are looking for. Mobil 1 is an excellent choice for high mileage vehicles. If you want to...
04/05/2009
Is Mobil 1 0W-40 Okay to Use in a Ford F-350?
Mobil 1 0W-40. I own a 2007 Ford F-350 4X4 with the Triton V-10 (gas engine). I'm aware that Ford recommends 5W-20. However, I honestly don't feel very comfortable working my truck with only 20 weight...
Mobil 1 0W-40 should work fine for your engine but you will pay the price in a loss of fuel economy. This is why the 5W-20 is recommended.
01/05/2009
Was a Dodge Ram Harmed Since CJ-4 Oil Not Used
I have a 2001 Ram diesel truck with 57,000 miles on it. I've used Mobil 1 15W-50 since it had 500 miles on it. I will be switching to the new 5W-40 turbo diesel truck. Did I do harm to my engine becau...
No.  CJ-4 is a certification valid for 2007 and newer engines due to new EPA requirements.  You should be fine.
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