I have recently fallen in love with the look of the 69 - 70 Eldorados. I can only imagine the power of thr 500 must be impressive. Can anyone tell me what the typical gas mileage is with that engine? When I was a teenager, my parents bought a new '69 Calais which had the 472 but in those days no one cared about MPG too much and I don't recall what that car got.
It seems, in my experience, that miles per gallon is not the best way to describe fuel consumption. But rather, minutes per gallon. If you compare the minutes it takes to burn up a gallon of gas on the highway, you'll see some similarity to the minutes per gallon in city driving.
I doubt you'll see 13.5 around town unless you are being towed...
15 highway is realistic however. I see 15-16 in pure highway driving with the cruise on and ~12 in mixed driving (roughly 50/50) in my '70 SDV.
Just be sure to give it a proper tune up, keep the tire pressure up, and don't drive like a maniac (all the time)
When setting the idle, be sure to do the factory-prescribed lean-drop idle setting. That will make a difference in mileage. Switching the vacuum advance to full-time, full-manifold vacuum will help you around town also, but I'd change the vac cannister to a unit that gives less total advance, or an adjustable one. If you have the vac advance like this, you've gotta remember to disconnect and plug it when setting timing.
Also, buy a dwell meter, you'll need it to properly tune up the points distributor. Always reset the base timing after changing the dwell.
Oh, yeah, and if you want a 500 under the hood, don't get a '69 - they "only" had a 472, but at least it's a high-compression motor.
Whats the city MPG? I dont mean anything bad by this, but I'm curious
Im pretty sure it gets about 8 or better with pure city driving. I think its a very efficient engine considering, its 4x4 and weighs in at 7800 lbs. She can move too! Still think the diesel would have been better.
Another cool thing about these v10s is that when they overheat a few cylinders shut down and act as pumps, pumping cold air through the block somehow! Im no Ford guy but thats pretty neat... for all i know though, several vehicles probably have that feature.