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Old 06-29-2008
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Mobil 1 Synthetic ATF

Have any of you folks, with an automatic (5r55e) transmission, used Mobil 1 synthetic ATF? I've got the 90,000 mile service coming up, and am going to do the whole deal to my transmission - 1,000 mile Auto Rx treatment, pan drop & filter change, flush & new fluid. I have always had the tranny flushed every 30,000, with Mercon V, at the dealer. I've been doing some reading, and this seems like it would be a good "upgrade". Any opinions/information would be helpful!

From the Mobil 1 website ...

"For many GM, Ford and import vehicles. Recommended for use in vehicles specifying:

Dexron III, Dexron IIIE, Dexron III-H

Mercon, Mercon V

Recommended for Allison C-4 and Caterpillar TO-2 applications

Recommended for Chrysler automatic transmissions

Mobil 1 Synthetic ATF is designed to meet the demanding requirements of modern passenger vehicles. The synthetic base oil composition enables excellent performance even in the severest of operating conditions. It offers outstanding gear shifting and power transfer performance. Versus conventional ATF fluids, the inherently high viscosity index and stability of Mobil 1 Synthetic ATF protect against thermal breakdown at high operating temperatures, while still providing outstanding performance at very low ambient temperatures.

Mobil 1 Synthetic ATF combines high-performance synthetic hydrocarbon base oils and a superior balanced additive system to provide significantly higher levels of performance above conventional fluids. This unique, advanced technology has demonstrated long drain capability, excellent friction retention, and low-temperature capability. Further, it helps to improve overall transmission durability and cleanliness.

Automatic transmissions should be checked for proper fluid levels at regular intervals, and the fluid should be changed at manufacturer-recommended intervals. However, this may vary due to your vehicle's operating conditions. Some manufacturers recommend more frequent changes of transmission fluid under severe driving conditions, such as heavy traffic, hot weather and trailer pulling."

Last edited by PW01; 06-29-2008 at 02:43 AM.
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Old 06-29-2008
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i use that stuff in my manual transmission and i love it... it shifted much smoother after i changed to the Mobil 1
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Old 06-29-2008
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I would stay with a "Mercon V Only" ATF. The Motocraft Mercon V is a synthetic blend, if you feel a need to "upgrade" use this full synthetic "Mercon V Only":

http://www.valvoline.com/pages/produ...sp?product=117
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Old 06-30-2008
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I'm sure that the Mobile 1 ATF is a good fluid but, IMO, the price is way out of line. Full synthetic Valvoline Mercon V is $4 a quart at a local discount store. Mobile 1 is about 2x or 3x more expensive, depending on the source.
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