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Mobil 1 Extended Performance
Are More Frequent Oil Changes Required in Humid Locations?
On a previous question regarding the possible need to change Mobil 1 Extended Performance more frequently based on driving conditions, you referenced the results of the Las Vegas taxi test, which sugg...
Under the circumstances you described, Mobil 1 Extended Performance will still provide the outstanding protection of the Mobil 1 family of products.  You can keep changing the oil every 15,000 miles o...
Should 1996 Pickup be Switched to Mobil 1 High Mileage?
I have a 1996 Ford Ranger Super Cab 3.0 V-6 with an automatic transmission. The truck has around 200,000 miles on it. I am currently using Mobil 1 Extended Performance 5W-30. Tell me if you would reco...
Although Mobil 1 High Mileage would provide outstanding protection to your engine, we would advise you to keep using Mobil 1 Extended Performance, based on the information you provided.
Will a Highly Modified Car Benefit More from Mobil 1 Extended Performance 10W-30 or Mobil 1 15W-50?
2004 Evo, 2L turbo, 48,000 miles, original owner. I have been running Mobil 1 10W-30 all the way up to 40,000 miles.  Then I switched to Mobil 1 Extended Performance 10W-30 just for the added protecti...
For your high performance application, we would recommend you use Mobil 1 15W-50. The higher viscosity will provide better protection in conjunction with higher levels of anti-wear potentially needed ...
Need for a Shortened First Drain Interval After Switching to Mobil 1 Extended Performance?
I changed to Mobil 1 Extended in my 2006 Sienna van. The original oil had 1,000 miles on it. Should I change my oil before 15,000 miles because some of the original oil residue could have stayed in th...
No, there is no need to flush your engine once you start using Mobil 1 Extended Performance.  However, to maintain your warranty coverage, we recommend you follow the oil change interval recommended b...
Will Using Synthetic Motor Oils After 30,000 Miles Dry Out Seals and Gaskets?
I was told that once your car passes over 30,000 miles synthetic oil is not good because may damage or dry out seals and gaskets. Is that the truth?
This is a myth.  You can continue using Mobil 1, Mobil 1 Extended Performance, or Mobil 1 High Mileage motor oil for the life of your vehicle.
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