Stevea100m
OBS Enthusiast
Obd1
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15 Canadian? Does that mean 15 kpg or 15mpg but in Canada?My question is: What mileage did you expect from this truck? What has it done in the past? Honestly, 13 does not seem that bad for a 3/4 ton 4X4. My own 1/2 Ton 2WD 5.7 Vortec gets about 15 Canadian in town (winter), and I'd guess around 20 max on the highway. (3.73 gears 4L60E)
The C-1500 is a lot lighter than your truck.
Anyway, I hope you can improve the mileage on the truck, and I second the thought that you would probably be best off running 87, which works fine in my truck.