Put my first tank of Biodiesel in yesterday. Added 27 gallons of 99% bio to make a mix of 70% bio. My first observations are:
1. Seems slightly harder to start; cranks for a second or so longer.
2. Way quieter, and that started to happen as soon as the new fuel got there. This can't be from just added lubricity. I suspect the bio is somewhat less volatile or explosive in the cylinder, reducing the knock sound common in diesels.
3. Seems to maybe have slightly less power under moderate acceleration, but not enough to be bothersome.

I bought a replacement fuel filter on the way home. I'll use it at the first sign of a performance problem, since bio is supposed to loosen up any accumulated crud in the fuel system.

I'll keep posting as I learn more; mileage effects, etc.

The price of the 99% bio here is Tucson is $2.729. That is $.47 cheaper than the $3.199 I see on most stations I go by. Thats' a bargain, I saved $12.69 on the fillup. You Tucsonians can get it at Arizona Petroleum Products, 1015 S. Cherry (520) 623-4721. They are open 6 to 6 5 days a week. NO; I have no financial interest in the place; he's a nice guy trying to help develop this new fuel source. Go help him do that.

Warren

 

Warren FWIW I drove about 275 miles pulling my trailer with the B50 that I have in the tank right now. I brought a spare fuel filter just in case. I started the trip with about 5000 miles on the existing fuel filter.
On the morning that I needed to return home, I got paranoid of a clogged filter due to all the stories that we have heard about Bio-D clogging fuel filters and decided to change mine out to avoid trouble while pulling the trailer. I realized that the old filter would have gotten us home no trouble.
I like running the stuff too and in the future when it's time to fill, I'll choose the Bio over Petro if it's in the area and the weather is warm enough.

 

What does warm weather have to do with it?

 

Viscosity. Bio will begin to "gel" up at a higher temperature then #2 will. That's why people like to run a mix of bio and #2 during the winter.

 

Same walmart chemicals will keep that from happening as far as gelling. Warren ctane is higher on the bio and the reason she is quieter is because the fuel is burning all the way down the cylinder as apposed to the sparkknock feel. Burns all the way down, bring the power up.

 

I wish bio was cheaper than straight #2 around here. I guess I'm lucky it's normally arounsd the same price.

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