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Ask Mobil Archive -
Fuel Economy
DateQuestionAnswer
04/29/2009
Will Using 0W-20 Oil Cause Lifter Ticking in a Scion xB?
I have a 2009 Scion xB which can use 0W-20 or 5W-20 weight oil. I would like to use the 0W-20; however, I am concerned that if I use the 0W-20 weight oil, it may cause the lifter to tick. I have had p...
The 0W-20 may provide you an edge in fuel economy. If you have a finely tuned ear you may hear lifter tick on start-up which would quickly disappear. We recommend you give the 0W-20 a try and see what...
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.
08/10/2008
Oil for Improving Gas Mileage
I am a 57 year old female so cars and oils are not my area of expertise. I just purchased a 2006 Subaru Forester with 55,000 miles. I asked my mechanic if there was anyway to improve my MPG. He said o...
If you are looking for help with fuel economy we recommend Mobil 1 0W-20 Advanced Fuel Economy. This is the Mobil 1 product that will give you the most fuel economy benefits. If the car has been taken...
07/02/2008
Oil Pressure is Dropping and Sludge Present in High-Mileage Pickup
I've used Mobil 1 full synthetic with 10,000-mile change intervals since break-in was over in my 1999 GMC Sierra, 5.3 liter gas pickup. Now at 100,000+ miles, oil pressure drops off from the initial 5...
Question: Are you experiencing any other problems such as lower fuel economy, loss of power, loss of coolant etc.?  It is difficult to diagnose the issue with a limited amount of information, but if w...
05/06/2008
Should Filters be Changed Mid-way Through Extended Oil Drains?
We drive a 1988 Buick LeSabre with a 3.8L. Aside from some lifter noise, it runs perfectly. Should I keep using Mobil 1 10-30 or switch to a different viscosity to improve mpg? Also, should I use a pr...
We recommend switching to Mobil 1 0W-30 Advanced Fuel Economy to get higher gas mileage and save a few bucks. (Actual savings are dependent upon vehicle/engine type, outside temperature, driving condi...
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