11th Jan 2016, 15:50
I had a 6.5 turbo diesel. It was a 93 GMC 3500 dually extended cab. Only drove it in town with a lead foot and got 11 MPG only. It originally had a 6.2, but it had been replaced with the 6.5.
I had a 6.5 turbo diesel. It was a 93 GMC 3500 dually extended cab. Only drove it in town with a lead foot and got 11 MPG only. It originally had a 6.2, but it had been replaced with the 6.5.
4th Dec 2014, 20:11
I own a 1994 Suburban 6.5 TD. The average I get is 12-15. I have an aftermarket PMD with the #9+ resistor and a modified exhaust (four inch with a cherry bomb muffler) and a K&N low restriction air intake set up. It's got tons of power, but won't get much better. The jerk I bought it from claimed 20 MPG. I've never seen that.