Isuzu I-Mark
Maintenance specs for 2 variants of the Isuzu I-Mark — from 1985 to 1989.
1985–1989 Isuzu I-Mark
1.5L I4 (4XC1) · FWD
70 hp / 87 lb-ft
Transmission
Type5-Speed Manual
Fluid75W-90 GL-4
Power Steering
TypeManual (no assist)
Fuel
Tank11.1 gal
TypeRegular 87
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingbelt — replace at 60,000 mi
Air filter30,000 mi
Drive belt60,000 mi
1985–1989 Isuzu I-Mark
1.5L I4 Turbo (4XC1-T) · FWD
110 hp / 120 lb-ft
Transmission
Type5-Speed Manual
Fluid75W-90 GL-4
Power Steering
TypeHydraulic
FluidATF Dexron II
Fuel
Tank11.1 gal
TypePremium 91
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingbelt — replace at 60,000 mi
Air filter15,000 mi
Drive belt60,000 mi