OK to be more accurate the loss of one mile per gallon was constant across
five fillups. I expected the first one or two tankfulls to be off but the
computer did not compensate even after the fifth one.
My bottom line is that a replacement of the t-stat alone may not be as
beneficial as replacing it along with some performance upgrades. Also, if
you get pinging under hard acceleration then forget about the gas mileage
and run the engine cooler.
--LaMont J. Gilles
"Andy Levy" <andylevy@bigfoot.com> wrote in message news:3AD0F983.8AE7AA7A@bigfoot.com... > Apples and oranges. I think it's fair to say the computer in your '93 > wasn't as capable of compensating as a more recent one. Also, the first > couple tanks you'll probably be seeing some changes in performance and > mileage simply because the computer's learning. > > "LaMont J. Gilles" wrote: > > > > Sorry > > > > There is one naysayer here. Back when my 93 Dak was stock my mechanic put a > > 180 t-stat on my 318 and it cost me about one mile per gallon (measured over > > the course of about five 22 gallon tankfulls). Today I put in a 180 t-stat > > because with the tinkering I have been doing I am getting pinging and so I > > am willing to lose some mileage (probably not now that the engine is running > > more efficiently) for a better performing engine.
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