Follow up: B-20 fuel economy..........

Several weeks ago, I started a thread about my experience with B-20. I had reported that my fuel economy began dropping rapidly upon my first tank full of B-20. Halfway through my second tank full of B-20, at the advise of several posters, I changed both fuel filters and air filter. My third full tank of B-20 delivered me my lowest ever mpg fuel economy at 24 mpg.

Last week I decided to go back to dino and see if there was any difference. Today I filled up again with dino and got 29.627 mpg. Also added to the dino was a minimum amount of Power Services, just as I have always put in before.

Running with the dino, lost power has been restored, and what sounded like "rod knock" (that troubled me for a while) is gone! Aside from the knocking with B-20, it only appeared while accelerating, the B-20 did quiet the engine down, but since I've run dyno, it remains as quiet as it had run on the B-20, about the only benefit I got from the B-20!

Some of you suggested before that I may have gotten bad B-20, and I haven't ruled that out. But at $2.80 a gallon for B-20, I'll stick with $2.39 a gallon dino for the time being!

[phantoms]

Make your own!

[aklim]

Problem with B20 is that it is 80% diesel. The issue is the same as with dino diesel. There was a place where I did lose fuel mileage. That means that not all diesel is equal. 80% of junk diesel could screw up the 20% biodiesel.

[coldwar]

My experience with B20 has been variable. First time there was a noticable power loss, excessive nailing, and a disappointing 22 MPG (Imperial). Ran regular Diesel for several weeks after, waithing for weather to warm up. Then I tried again, and delighted that I went from 25 MPG on dino to 28 with the B20. After several fills of B20, mileage has maintained around 26 to 28, with good power, quieter operation, but still some nailing when cold. I was suspicious after first try with the only BioDiesel station around here having the pumps located on the same pad as their car wash. But subsequent experience, especially with somewhat warmer temperatures has been very promising.

Dave

1976 White 300D W115 "Pearl"
1970 Euro 200 parts car "Earl"

[boneheaddoctor]

I get the same milage on both of my cars with B20 as I get with 100% camel pee the arabs sell us.

[aklim]

Originally Posted by boneheaddoctor

I get the same milage on both of my cars with B20 as I get with 100% camel pee the arabs sell us.

Most of it is from Venesuela tho so I am not sure what sort of pee it is.

[suliot1]

1984 300sd