Synthetic transmission oil

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Introduction
The idea here is that synthetic oil has less friction leading to less energy being absorbed as heat into the oil. It can also help your car start faster in cold weather and warm up faster. Also increases parts life.

This mod is most effective for vehicles in cold climates, since the viscosity of conventional lubricants increases as ambient temperature drops.

Instructions for mod

At your regular transmission oil change, put the proper synthetic oil in.

See your owners manual.

User experiences

Please enter your user name and any relevant data in the table

User data
User Name Car Make, Model, Year Cost of Mod Time to Perform Mod MPG Before Mod MPG After Mod MPG improvement guess Instruction Link
Weather Spotter Toyota Matrix, 2006 $10 0 About 1%. tank to tank (no ABA testing) In the winter it helped my car start & warm up about 15% faster.

The national research council found that Low Viscosity Lubricants (synthetics act like lower viscosity) could get a .5% MPG gain for $6 to implement. This gain covers both engine and transmission oil.

Problems / Consequences of mod

None

References

Forum thread links

Effect of gear oil viscosity on transmission efficiency

External links

national research council test data