I didn't know there was 85.5 octane gas? The compression number I found for the 20R is 8.5? The compression ratio for the 22R is 9.0:1?? I guess the lower compression of the 20R runs on the lower octane fuel.
Gnarls.
85 is considered regular grade in Colorado where the elevation is higher.
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1989 4Runner: Dual Ultimate (Inchworm front & Marlin 4.70 rear), Marlin Twin Stick, 1200-lb clutch, 4.88 R&P, Aussie Front, Detroit rear, 30-spline Longs, Long hub gears, ARP hub and knuckle studs & 35x12.50 Cooper STT PRO tires. Marlin rear bumper & sliders. FROR front bumper. SAS with Alcan springs & Rancho 9000XL shocks. Budbuilt Bolt-on traction bar. Custom Interior Cage by Those Guys Rod and Customs.
Moab Tested & Rubicon Approved
