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Ask Mobil Archive -
Oil Drains
DateQuestionAnswer
09/09/2008
Any Reason to Switch Off a Semi-Synthetic Motor Oil in a Higher Mileage Truck?
I have a 2004 Ford E-150 with a 4.6 and 205,000 miles on it. I have changed my oil and filter every 4,000 miles with the same 5W-20 semi-synthetic oil. Should I stay with a semi-synthetic or would I b...
You can stay with the semi-synthetic and use Mobil Clean 7500 which provides guaranteed protection for 7,500 miles or six months, whichever comes first.  Obviously, a full synthetic like Mobil 1 High ...
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...
06/25/2008
Any Problem Changing the Oil When the Engine is Cold?
I have read that the engine needs to warm up before you do an oil change to make the oil flow better. I never did this. I just let the engine cool off overnight to let the oil settle at the oil pan, t...
We think it is best to change the oil when it has been warmed up.  The reasoning being that the oil flows better, and sludge and other deposits are more likely to be removed from the oil pan.
06/25/2008
Will Mobil 1 High Mileage Clean Up a Badly Sludged Motor?
Can Mobil 1 High Mileage clean up a badly sludged motor?
Yes, Mobil 1 High Mileage can help to clean up a badly sludged engine but it will require short oil and filter change intervals as the clean-up proceeds. Keep in mind that hard carbonous and lacquer t...
05/12/2008
What Happens to the Engine Sludge and Deposits Removed by Using Mobil 1?
I read your posting on switching high mileage vehicles to Mobil 1 and you mentioned that by doing so that would help remove the engine sludge and other deposits that accumulate over time. My question ...
Mobil 1 High Mileage will help to clean up sludge and other deposits by carrying it in suspension. Mobil 1 is formulated with a strong detergent/dispersant additive system, which disperses and agglome...
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