500 mile gear oil change after gear install?
I have 4.10s going in next week. When I ordered the gear install combo from AM, they sent me 2 quarts of RP 75w90. After reading online, I ordered 3 quarts of RP 75w140.
Now, I'm left wondering whether I should order another 3q of 140 to do the initial break in, and replace it with more 140 after 500 miles. Can I get away with doing the break in with the 90 weight and 140 afterwards?
08 GT/CS "Crimson"
FRPP 4.10 Gears, JLT Series III Intake, Bama 93R Tune, Summit Racing O/R H pipe, Borla Stingers, Eibach Pro Springs, Koni STR.T Struts/Shocks, GT500 Spoiler, Tinted turn signals and side markers, black vinyl decklid wrap, SHR CS Grill Insert, LED Reverse Lights