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block heater questions.
Does block heater save any money (on gas and electricity) ? Can I use it in winter when car is turned on (block heater plugged into cars cigarette lighter) so it will warm up faster(when coming home in cold winter midnight from work). Can block heater cause to much stress on head gasket (Uneven expansion of block and head(s)). Or dipstick heater is better solution than all of the above?
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