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Ask Mobil Archive -
General Synthetic Motor Oil Info
DateQuestionAnswer
10/09/2010
Respond to Advise Against Using Synthetic Motor Oil in an Older Mercedes-Benz
I own a 1995 Mercedes E420 sedan.  The dealer I bought it from stressed that I should not use synthetic oil. My mechanic has also agreed, no synthetic oil. The reason they both state is: the car is to...
If the engine is in good condition, using a synthetic oil should not be a problem. Mobil 1 advanced full synthetic products will protect and maintain your engine in excellent condition and are proven ...
07/19/2010
Is Decline in Fuel Economy Common When Switching to Synthetic Motor Oil?
I changed to synthetic oil and since then, my mileage is continually getting worse. Is this normal with the first change?
When you change oil types it is not unusual to see changes in fuel economy or even oil consumption for the first couple of oil changes. We assume you are comparing the same viscosity. If you are, then...
04/12/2010
Are Synthetic Blend Motor Oils Best for Infrequently Driven Cars?
I have 1984 Mercedes 300 SD Diesel auto with 160,000 miles. No blow-by at this time. Is semi-synthetic 15-40 wt. or fully synthetic 15-40 wt. the best way to go? I've been told semi-synthetic is best ...
The best option will always be a fully synthetic oil over a synthetic blend due to its superior protection against deposits and longer engine protection. To find out more about our Mobil 1 fully synth...
04/25/2009
Ester Oil and Nissan Engines
I've just purchased a Nissan 2009 370Z, which has a 3.7 liter engine that produces 332 HP @ 7500 RPM's, and has a compression ratio of 11 to 1. I've been advised by the Service Manager at Cronic Nissa...
We have not been able to get much information on the Nissan Ester Oil but our analysis indicates that it is part or full synthetic oil. Many synthetic oils, including Mobil 1, contain a variety of syn...
04/06/2009
What Will Happen Switching From Synthetic Motor Oil to Conventional Oil
I have been in the mechanic business for 8 years and was always taught that you cannot go back to conventional oil from synthetic oil. I have seen the damage caused by going back to conventional. Is i...
Synthetic oils will provide better protection than conventional oils, but switching back and forth between full synthetic and conventional oil will not damage the engine. Of course, this depends on th...
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