Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - MPG's (difference with bio D vs. SVO vs. regular diesel?)

dieseltim · 04-18-2012, 02:58 PM

As for the OP, I have run homemade bio for the last 8-9 yr. Mostly in my 96 and 98 Dodge diesels. I also have run lots of it in my 06 Jetta.

As far as MPG and % of Bio, I found that the Jetta got its best MPG from B20- B50. After that it started to fall off a bit until I was down below my D2 MPG at about B60-B70. On B100 I was about 3-4 MPG lower than D2.

So, if the price of D2 and B100 were the same then B20 would be the best option. But, with D2 double or maybe triple the cost of home made B100, it is really not a matter of money but how much free time I have to make it (time is money LOL).

I think that the improved MPG is not only due to the better lubrication, but the higher O2 content of Biodiesel that allows for a more complete combustion. My 98 Dodge will black smoke if you get on it too hard if it has D2, but the same hard acceleration with B100 will only give a slight haze. MPG in the Dodges do not seem to be much different D2 or B100, maybe because they don't get more than 20 MPG on a good day.

Dieseltim

04-18-2012, 02:58 PM	#24 (permalink)
dieseltim EcoModding Lurker Join Date: Apr 2012 Location: Griffin Ga. Posts: 4 Jetta - '06 Jetta TDI Sedan Thanks: 0 Thanked 2 Times in 2 Posts	B20-B100 in an 06 Jetta TDI 1.9 PD As for the OP, I have run homemade bio for the last 8-9 yr. Mostly in my 96 and 98 Dodge diesels. I also have run lots of it in my 06 Jetta. As far as MPG and % of Bio, I found that the Jetta got its best MPG from B20- B50. After that it started to fall off a bit until I was down below my D2 MPG at about B60-B70. On B100 I was about 3-4 MPG lower than D2. So, if the price of D2 and B100 were the same then B20 would be the best option. But, with D2 double or maybe triple the cost of home made B100, it is really not a matter of money but how much free time I have to make it (time is money LOL). I think that the improved MPG is not only due to the better lubrication, but the higher O2 content of Biodiesel that allows for a more complete combustion. My 98 Dodge will black smoke if you get on it too hard if it has D2, but the same hard acceleration with B100 will only give a slight haze. MPG in the Dodges do not seem to be much different D2 or B100, maybe because they don't get more than 20 MPG on a good day. Dieseltim