js1020

same hear mobil 1 everytime

casey225

Probably regular. I change at regular intervals and put "low impact" miles on my car. I don't think I'll benefit from synthetic.

lifeisgood

I frirst read about Mobil 1 in Popular Science or Popular Mechanics years ago. They ran two engines for 100,000 miles then tore down the engines and measured everything against original manufacturers specifications. In each case, oil had been changed at the prescribed intervals. The engine that had been run on regular oil had significant sludge buildup and the engine parts showed noticable wear (I forget how much). In contrast, the Mobil 1 engine had absolutely no sludge buildup, and amazingly the engine still measured within specs for a new engine--in otherwords, there was no appreciable wear.

So, if you think you know better and and want to make a decision based on feeling and not fact, go ahead and use regular oil. But if you intend to run your car hard or want it to last well beyond 100k miles, then based on what I've read, I'm going to stick with synthetic oil. I don't think it's a waste of money, I see it as cheap insurance.

Also, why is that BMW only uses synthetic oil in their cars? I know people who are running their BMW's with 250 thousand miles--think the synthetic oil had anything to do with it? Finally, I'm sure we have a few petroleum engineers on the board, let's hear from you.

GreyHound

iTrader: (1)

Even if you have low impact miles, and don't race, you can benefit from the use of synthetic oils. Oil is used for heat dissapation and lubrication. Check out this link for some good oil information we can benefit from. its pretty good.
http://www.quakerstate.com/pages/carcare/whattoknow.asp

lifeisgood

Here read this--no wear after 200,000 miles and very little after 1 million miles

http://exxonmobil.com/corporate/file...fact_sheet.pdf

Using Mobil 1 regularly helps to protect critical engine parts in high temperatures, reduce
deposit build-up and sludge, and condition seals to prevent leaks.

Mobil 1 Proof of Performance Testing
Mobil 1 has undergone extreme testing under some of the most demanding circumstances and
test results continually confirm the outstanding performance protection of Mobil 1.

• One Million Miles on Mobil 1
A 1990 model year import car was tested for 1,000,000 miles with Advanced Formula
Mobil 1. After completing the test, internal engine components showed little wear and oil
consumption during the entire test was only .040 quarts/1,000 miles.

• 200,000 Mile Comparison
Two vehicles were tested over 200,000 miles using Mobil 1 5W-30 and a premium brand 5W-
30 conventional oil. Test results revealed greater engine-wear and heavy varnish deposits for
the conventional oil and oil consumption was eight times higher than Mobil 1. The engine
parts from the Mobil 1 vehicle showed no significant wear and still met factory specifications
at the end of test.
-

ecr527

Once I do my first oil change, I will be switching to synthetic oil.

newr

My thought is the same

newr

BMW uses Synthetic because the service interval for their car is 15K miles.

My old Mercedes w/300k miles used conventional oil since the begining. However, I changed oil religiously @ 3K mile interval.

DanIS350

Yeah, I'm not so sure that a 15K interval is cool. My friend's beamer was just retired after the dealership said it needed a new engine due to a significant amount of sludge build up.

evotolexus

My last car required Mobil 1, so I will continue to use. However, I do feel regular oil is best for the break-in period for the components to properly seal. Synthetic oil is generally too slippery for the components to set and seal.

So I recommend running regular oil first 3-5k miles, but then switching to synthetic. My .02c

Big Andy

Ran my Audi on synthetic but that was the 20k oil change intervals. Since the intervals are only 10k on the Lexus I'll just use the good mineral oil.

4TehNguyen

iTrader: (1)

would synthetic even sludge up like that, did youre friend use synthetic?

also synthetic helps greatly for cars with forced induction where you need stronger and longer lasting lubrication because of the extra heat associated with super or turbo charging

Lets Drive

iTrader: (3)

Depends on the engine, and what stage its in. During the break in period after installing my new engine, I ran non-synthetic. Running synthetic would've extended the break in period for too long, at a point where it was not necessary. However, after the break in period, I'm running synthetic on a regular basis. Synthetic will run in the IS, just as it does the other vehicles.

newr

What year was the car and what mileage did the car have?

Tony1

Toyotas don't use synthetic oils and their engines are twice as reliable as Bmws, sorry
but your point was invalid..