I just had a Torsen T2R (the FR500 one with 4.0 bias ratio) installed about 1200km's ago and I'm going to do a break in oil change.
The installer advised me that Torsens shed a lot of material and to change the fluid often.
The car sees a lot of track time during the summer and then a mix of hwy/city driving.
3 quarts of synthetic 75w140 will cost me about $60-70 up here, yet I can get a 5 gallon pail of 85w140 conventional from Canadian Tire for $65. It's their 'in-house' brand, Certified, which I believe is made by SOPUS. This 5 gallon pail will probably net me about 8-10 diff fluid changes for the price of one synthetic. Here's the oil in question: http://www.canadiantire.ca/en/pdp/certified-85w140-extreme-pressure-gear-oil-20l-0280252p.html
My research tells me that synthetic oils in a torsen can reduce the bias ratio, and that many aftermarket diffs (True-Trac, etc.) were designed for conventional. Surely synthetic will give me (slightly) longer gear and bearing life, but I doubt if it will be cost-effective.
So, get the conventional and change it often or bite the bullet and go syn. and change it often as well?
The installer advised me that Torsens shed a lot of material and to change the fluid often.
The car sees a lot of track time during the summer and then a mix of hwy/city driving.
3 quarts of synthetic 75w140 will cost me about $60-70 up here, yet I can get a 5 gallon pail of 85w140 conventional from Canadian Tire for $65. It's their 'in-house' brand, Certified, which I believe is made by SOPUS. This 5 gallon pail will probably net me about 8-10 diff fluid changes for the price of one synthetic. Here's the oil in question: http://www.canadiantire.ca/en/pdp/certified-85w140-extreme-pressure-gear-oil-20l-0280252p.html
My research tells me that synthetic oils in a torsen can reduce the bias ratio, and that many aftermarket diffs (True-Trac, etc.) were designed for conventional. Surely synthetic will give me (slightly) longer gear and bearing life, but I doubt if it will be cost-effective.
So, get the conventional and change it often or bite the bullet and go syn. and change it often as well?
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