[carlitos84]

i juz wana kno does it really make adifferance on wat kind of oil u used?

[EagleAutosports]

Synthetic oil has been proven to add 3-5 hp, more if you change everything including engine oil, tranny fluid, and rear end lube. It doesn't break down, making for longer oil life, superior protection (you can stick a finger in mineral and synthetic and feel the difference), and then it doesn't completely drain off of the parts which can avert cold start up wear. It's more than worth the money.

[fiveohnick]

that stuff is slippery for sure! I like to use Rotella T by shell. Its not synthetic but they make a synthetic Rotella oil. I have the synthetic in my stang and it is ok but I really notice a difference in the regular Rotella T 15w40 non synthetic. I definitely feel a power difference and the stuff is still clean after 3000 miles in my girlfriends ranger. Once I found out about this stuff I changed the oils in all my cars over to it. BUT its not recommended for cars newer than 2000 because the amount of zinc in it. It reacts with the cats and causes them to go bad. FEEL THE POWER! Synthetic is cool but this stuff is weird check it out! wal-mart has it.

[Pmamm]

As I said in another thread, it's not needed as Motorcraft 5w-20 is an excellent oil verified by oil analysis on Bob Is The Oil Guy However if you do decide to use synthetic, Mobil 1 is still the best for the money. Walmart has the best prices I believe.

Mobil 1 is factory fill in:

• Acura RDX
• Aston Martin
• All Bentley Vehicles
• Cadillac CTS, CTS-V, Escalade, XLR, XLR-V, SRX, STS and STS-V
• Chevrolet Corvette C6 and Z06
• Chevrolet TrailBlazer SS
• Chrysler 300C SRT-8
• Cobalt SS S/C Coupe
• Dodge Caliber SRT-4, Charger SRT-8, and Magnum SRT-8
• Jeep Cherokee SRT-8
• Mercedes-Benz AMG Vehicles
• Mercedes SLR
• Mitsubishi Evolution
• Pontiac Solstice GXP
• All Porsche Vehicles
• Saturn Ion Red Line and Saturn Sky Red Line
• Viper SRT-10

[Bruski6595]

My first experience with synthetic was in a 2-stroke engine. The quick story is that it wouldn't let the rings seat because it is that slippery. I had to change back to petroleum oil to seat the rings. Then went back to synthetic.
If you took 2 boards and put marbles between them...the marbles are oil molecules...the boards are 2 metal surfaces...then moved them back and forth, the smaller marbles would fall out, which would put more pressure on the larger "molecules, these would eventually break down due to heat. Synthetic oil has molecules that are the same size, so they ALL carry the load. There are none to "fall out".
I have a 97 F-150 with 239,000 miles on it. It is in everything. I changed my trans fliud(synthetic) after 125,000 miles on that synthetic change, and found a very small amount of material on the magnet. The bottom of the pan looked clean.
If going to make the change, run some engine cleaner through the oil before the change, and if the engine seems to use some oil after the change, replace the filter a couple times. That means the filter could be getting clogged.
I started with Amsoil, so I was only changing once a year, with 2 filter changes in between. (That was 25,000 miles). I now just watch for sales on whatever brand, due to the lesser miles I put on the truck. Yep, I am a true believer in synthetics.

[White_X3_LE]

A friend of mines father worked for Mobil. He talked to a guy at the company about synthetic oil. The other worker (some sort of tech) said that when you use synthetic oil, all you need to do s replace the filter and add a quart every 3-5k miles, and drain every 12k miles. The only reason for the change at 12k miles is because cars use an open oil system, and the oil becomes contaminated. I always use Mobil 1, and change it every 3-5k depending on he weather. lol.