My reply may have been too brief. If you read up a lot on the Evans Coolant and talk to their techs,you will find that your guage temps will most likely go up but "not to woryy their product is taking more heat out of engine". I didn't like that when I tried it and was trying to eliminate a slight hot weather ping. Evans made that much worse and to bring guage temps down I too had to add timing also, to the point of surge at cruise. I wasn't going to put up with that so I drained the Evans out, put 33% ethylene glycol/distilled water back in, backed my timing down to the tune I had before and the engine was happy with and the guage temps came back down to a level I was comfortable with and never tried Evans again.
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