I did a gas mileage check today on my 77 Westy Loaf, and was surprised/shocked to see it worked out to 16mpg on a Canadian gallon, (about 12mpg on a US gallon). I know it needs a tuneup, but all that can really change is the plugs, since I have a Crane optical 700XL ignition system. The brakes are not dragging, air pressure in tires is good, alignment is spot on. Timing is right on the money. Engine is excellent shape. Can plugs themselves really cause such a drop in mileage, (they DO have far too much mileage on them) ? I think I usually get about 20mpg around town. Comments please?
Courtney