Thanx for responding 79Mercy,
No. Pardon my ignorance, but where exactly is the 'tank strainer'? This is my 1st Benz, btw. Is there a screen inside the tank (which I just filled up)? There's no electric pump w/screen in the tank, unlike newer gassers. Or do you mean the tiny see-thru, in-line filter under the hood - just before the hand primer valve? I've changed that one, and can see fuel going thru it (no sediment or air bubbles), but I've never been able to locate anything that looks like a screen in/near the tank. Where to look?
I think it still has the original tank in (because it's really rusty up near the filler neck), which gravity feeds the fuel from a hard line (steel?) sticking out from the forward-side of the tank. It seems like this line was factory-welded. There is no plate to remove it, although that's where I'd figure any 'tank strainer' screen should be positioned so one could clean it periodically, right? This hard line was cut before I got the car and a three inch rubber line was connecting it to the other hard line going forward to the IP. Maybe that's normal, or perhaps it got broken? Or cut on purpose - maybe vandalized for the diesel during the '73 and '79 gas rationing when fuel prices increased 400% overnight (the 1st time, not like the $1 to $4/gal. politically-charged increases we saw just a few years ago - thank you George Bush
). Google 'Peak Oil' in case you're not old enough to remember those events because they're sure to happen again in coming years, which is another good reason to learn to make bio-d and WVO tech.
Anyway, I've since replaced all of the filters and rubber fuel lines with clear braided polyvinyl lines because the rubber ones were old and got soft from 2+ years of b100 bio-d, and also because I like to be able to see if the fuel is actually running thru them adequately, without any air bubbles. Unfortunately, this new fuel-deficiency problem only occurs at higher speeds -- when I can't observe any fuel lines for blockages/bubbles - because I'm too busy driving! The way it's acting, it's got to be fuel-related! I should've never gone back to ULSD #2.
It's been known to destroy IPs after they've been pampered with fine bio-d.
Btw - why are you concerned with running WVO in THIS particular car.
It runs fine in all my other autos, also the home back-up dzl generator. Actually, WVO is better for ANY diesel, but ONLY when done properly, of course. It's what they were born to burn, just ask Rudolph Diesel.