heh, i have a 99 with under 40k miles. ive been using regular since i had the car.

 

You'll feel a difference even after the first time you use it.
Smoother idle, smoother shifts..
Mobil 1 Synthetic is 5qt for like $17 at WalMart!

 

this is what i was told, if your car is over 100K miles, should be best if stick with regular:

1/. there might be cracks in your engine but covered by the dirt leftover by regular oil hat's what keep ur engine in okay condition

2/. if you use synthetic, best if you flush your engine before use them, therefore, will flush away the dirt build up in those cracks and yet make your situation worse, it'll leak and stuff.

so Synthetic Blends is the 2nd Option where it won't make much diff. to Very High milage & old engines.

Full Synthetic brands such as AMSOil are NOT reccommended, eventhough It only require you to change oil FOUR time / yr or every 25,000 Miles.

that's what I read in the report + review. I can't put it well enough so hopefully you can understand it.

 

Synthetic is no diffrent than regualr oil just takes more loot outta ur waller , synthetic just give u more milage before you gotta change the oil in the car... IMO stick to oil that is formulated for the engine

 

To the last person that posted, synthetic oil IS formulated for your engine. Car manufacturers in general don't put synthetic in at the factory becauses it is more EXPENSIVE. Some of the more expensive cars do come with synthetic oil right from the factory. BMW, MB, Porsche, Dodge Viper, Chevy Corvette, these are all I can think of right now. So it is primarily a $money$ issue with the auto manufacturers. It's cheaper to go dino oil for the manufacturer, its cheaper for the average consumer to use and it works ok for 90% of the driving and drivers out there.

That said, I would not recommend synthetic on an older engine if you have been using regular oil all along. It may cause your sseals to leak and it may cuse some problems becausse of deposits that have already built up inside your engine.

Advantages of synthetic:
Flows more easily, alowing for easier cold starts, less engine wear at start up and during warm up, better protection during very cold weather operation.
Has a higher temerature range without breaking down, alows better engine protection in very hot weather, especially stop and go traffic during the summer time.
Because it flows better, you will get a slight improvement in fuel economy and acceleration.
It keeps your engine cleaner because it does not promote deposit formation due to oil breakdown.
More stable viscosity range because the oil does not breakdown and become a single viscosity oil as dino oil does over time.
Allows you to take advantage of car manufactures extended oil change intervals because synthetic doesn't break down in "severe" use categories.

Disadvantages to syntetic:
More expensive
Not recommended for use in higher milage vehicles that have always used dino oil in the past
You still must change the oil in accordance with the manufacturers recommendations (6k - 7.5K)

 

My 96 accord ex has been using mobil 1 (usually 5w-30) since 5k miles. My brother was the first owner and the car now has 82k miles. The first 6 years was spent in Buffalo so there were a lot of cold starts. I took over at 60k miles. The valves are still very quiet and it has never had valves clearence adjustment done since new. The car doesn't use a drop of oil between 4k miles oil changes and there is no leaks as far as i can tell. I think i will keep using it since it really doesn't cost much more than regular oil. May be about 13$ more each change and it take about 4.5 qt.