I use the Redline Heavy Shockproof in my gearbox and it held up
beautifully over 3 race weekends. Others I know that use it change oil
every 4 race weekends or when it's time to change ratios. I've been
happy with all the redline products I've used.
I used AMSoil 75W90 in the rear and it held up well, I changed it to
Mobil 1 just because I had a few quarts of Mobil 1 in the garage....
>From what I understand Castrol makes an excellent synthetic gear
lube...If you can find it. I never have been able to.
All the best
Aaron Johnson
#38 F Production Spitfire Mk4 Oregon Region SCCA
http://www.geocities.com/spitracer9
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