It's finally time to reinstall my transmission and diff into my Rx7, and it's come to the point of buying fluid. 75W90 is specced for both trans and diff, diff is a limited slip.
Best price I can find for my go to (Royal Purple) is ~25 for 1 quart at Canadian Tire.
Store brand synthetic 75W90 (Canadian Tire's "Motomaster") works out to $15 per quart.
As I need 4 quarts to fill both, this equates to $100 for the Royal Purple vs. $60 for the Motomaster, which is an appreciable difference. The diff also needs LSD additive, which is say $10 per bottle, so call it a $30 difference. $30 is not inconsequential to me, as I need other parts still. However, if the Royal Purple is going to provide increased performance in smoothness / longevity I'll spend the extra money.
Has anyone gone from a name brand of fluid to a store brand of identical specification (and certifications, from what I can tell), or vice-versa? Was there a difference?
Thanks
Best price I can find for my go to (Royal Purple) is ~25 for 1 quart at Canadian Tire.
Store brand synthetic 75W90 (Canadian Tire's "Motomaster") works out to $15 per quart.
As I need 4 quarts to fill both, this equates to $100 for the Royal Purple vs. $60 for the Motomaster, which is an appreciable difference. The diff also needs LSD additive, which is say $10 per bottle, so call it a $30 difference. $30 is not inconsequential to me, as I need other parts still. However, if the Royal Purple is going to provide increased performance in smoothness / longevity I'll spend the extra money.
Has anyone gone from a name brand of fluid to a store brand of identical specification (and certifications, from what I can tell), or vice-versa? Was there a difference?
Thanks