The p0087s were all produced at stock fueling levels, and a 6.6L doesn't use much more fuel than a 6.5L, right - if your loaded mileage is the same?
Enthusiast
The p0087s were all produced at stock fueling levels, and a 6.6L doesn't use much more fuel than a 6.5L, right - if your loaded mileage is the same?
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
Administrator
Technically, correct. However, not all the fuel pumped actually finds a cylinder. Both engines use the fuel for lubricant and coolant, and return a significant portion to the tank. I don't know which returns more. I don't know which carries more heat, but my truck, even in Winter, will show a hot running fuel temp of 140°+. I've never observed the fuel temp or return rates of a 6.5 system, so I can't compare. I don't know if it even matters, one way or another. I do know several folks who have installed, and are currently running, a 6.5 OEM pump, or similar aftermarket, successfully on LB7's.
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