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#1
11-01-2005, 11:19 AM
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617 running cooler on WVO
Ever since I switched to running WVO in the '85 300D, I've noticed that the coolant temp runs a bit lower than when running dino. It usually sits at around 80C on WVO while on dino its closer to 85C. In fact this morning the gauge was struggling to get to 80C. It was running in the mid 70's. Outside temps were probably in the low 50's so it really wasn't that cold.
Has anyone else noticed their cars running on WVO are running cooler?
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 
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#3
11-01-2005, 01:34 PM
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Nope, all three of my cars run the same temps on veggie or diesel.
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1984 300Sd 210k Former cars: 1984 300D 445k (!!) (Strider) Original (and not rebuilt) engine and transmission. Currently running on V80 ( 80% vegetable oil, 20% petroleum products). Actually not, taking a WVO break. 1993 300d 2.5 275k. Current 120/day commuter 1981 300SD 188k (Hans) Killed by a deer
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#4
11-01-2005, 03:45 PM
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I run a coolant fuel line heater as well. I've read that WVO doesn't have the BTU's that dino does. That may be a reason for cooler running temps but I never thought it could be that significant. I have a veg-therm that I'll be installing soon so it'll be interesting to see if that makes any difference.
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
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#5
11-01-2005, 04:11 PM
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I suspect that VWO simply has a lower heating value than diesel (less BTU/lb) resulting in less waste heat to the coolant system.
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