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Last summer running 40psi in my 16in firestone FR710's they sucked in the rain. Well today I got a chance in similar conditions to drive at 34PSI, I think they were actually worse! Might be the less tread depth with 15,000 more miles though.
If I were you I would just split the difference between your normal PSI and door place card. I suspect your MPG will be almost as good as normal. I loose about 5mpg highway when it rains, mostly due to the defogger and AC use I believe(I loose similar MPG in the summer using the AC).
If I were you I would just split the difference between your normal PSI and door place card. I suspect your MPG will be almost as good as normal. I loose about 5mpg highway when it rains, mostly due to the defogger and AC use I believe(I loose similar MPG in the summer using the AC).
