A few weeks off and this damn thread is still going... and I still haven't moved out of D1... bugger.
Anyways, I went back a few pages and called it good. Saw this sub-thread and thought I'd weigh in a bit...
Originally Posted by bmwdslpwr
...bio diesel cuts down power and economy
Having driven more than a few oil burners in my day and run both Bio (B5, B15, B20, B50, B85, B100) and 1D/2D... you won't notice the impact.
You lose maybe 1-2MPG and the power... well, you don't notice it, you still churn out easily as much ft lb of torque as a V8.
That being said...
Originally Posted by adw_tdi
...if you were to run B100 on a JGC 4x4...
You will want to watch your oil levels like a hawk. In this rig, it's recommended to not go over B25, and it has nothing to do with your engine, it's the exhaust system (or rather the systems setup to clean out the DPF) that are the issue.
If you run anything higher than B25 (and even then, check your oil levels) you run the risk of hydrolock. Basically, the way the system works is post combustion, it squirts fuel into the cylinder/exhaust system. Normal diesel has a lower smoke point, and will combust (like it is supposed to). Bio, on the other hand, has a higher smoke point, and WON'T combust.
This results in the oil making it's way along the cylinder wall, and eventually into your engine oil. At this point, bad things can happen.
I'm not saying don't do it.... just be aware of it.
If you do run Bio, expect your engine to be a bit more happy though. It keeps the bits better lubricated and clean (seriously, run a couple tanks of B100 through a diesel that's never seen it before, the sheer amount of shit you will flush out of the lines (and into your fuel filter) is horrifying).