There is a large variation in the quality and longevity of synthetic motor oils. The factory recommended drain intervals range from 3,000 miles to 35,000 miles (or one year of service) depending on whose oil you purchase. Pennzoil recommends 3,000 for its synthetic. Mobil recommends 3,000 to 7,500 depending on driving conditions (car manfacturer's recommended change). Mobil used to have a 25,000 mile drain but has changed its formula several times over the years. We can provide addition information on synthetic oil comparative tests if desired.
Best regards,
quote:
Originally posted by Kevin:quote:
Originally posted by ahowkins:
The manufacturer of my car recommends that Mobil 1 be used. After a recent service at the dealer I noticed that a Penzoil synthetic oil had been used! I contacted Mobil and asked them their thoughts, they responded by telling me that for the short term no harm will be done but to change back to their product soon. The dealer tells me that ALL synthetic oils are produced by Mobil and they just supply the product to all under licence...
Anyone like to comment?
Alan
'Rider Support'
(C.)918-636-1281