Great Stuff

I have been using Mobile 1 Extended Performance 5w-30 in both my BMW and my Toyota for the last several years. Mobile 1 is recommended and original equipment in my BMW and has been great in the Toyota. I only drive each vehicle about 7-8k miles per year, but have had no problems going 12 months before changing. I also like the fact that less frequent oil changes are better for the environment. The extra cost of full synthetic oil is well worth it.

Fine oil, but better prices are out there

Amazon is my source for buying so many things, and I am a satisfied user, but we do still need to check locally. Mobil 1 oil is on a promotional sale at Advance Auto -5qts plus free Mobil 1 filter($10)for $30. Of course, it's an excellent oil with the EP version permitting 15,000 miles or 1 yr(I wouldn't really go that far myself)between changes. It can be economical to use since less oil changes can more than make up for the additional cost of this synthetic oil.

Just what I wass looking for

Hard to find, but worth it.
I always run 7,000-15,000 miles between oil changes. Motor has 80K using this oil. Still runs like new.

With Mobil 1 EP there is no need to change your oil every 3000 miles

This is the best oil out there for the regular driver who wants maximum protection for the car's engine. A little research brought me to the Mobil 1 Extended Performance line of Synthetic oils when searching for a product that could allow me more time between oil changes. Mobil 1 EP allows a 15,000 mile/1 year guaranteed life of the product. I have been using this in combination with their Mobil 1 filters for years. The cost is higher, but I only need to change the oil once a year!

Originally developed for aerospace, synthetic oils became commercially available in the 1960's. Some technical advantages Synthetic Oil has over Conventional Oil are [from Wikipedia]:

- Measurably better low and high temperature viscosity performance
- Better chemical & shear stability
- Decreased evaporative loss
- Resistance to oxidation, thermal breakdown and oil sludge problems
- Extended drain intervals with the environmental benefit of less oil waste.
- Improved fuel economy in certain engine configurations.
- Better lubrication on cold starts

By using a Synthetic oil not only will your engine be able to perform better, but it can also extend the engine life. I HIGHLY recommend use for those with more severe or high demand driving conditions.