neoiceblink

Things noticed that seem off is noticed more smoke coming out my tail pipes then I have gotten the past 2 winters, its white smoke. The temp gauge works fine will be at full temp within 10mins ideling, also heat works perfect in it no issus taking long to warmup. Also noticed more ticking sound coming from exhaust then past 2 winters also.

I have a 1995 lx400 and since the cold weather gas mileage is all over the board. If above say freezing getting 13-16 city, and when it gets down below freezing getting like 8-10 miles to the gallon. Checked under it for leaks none, don't smell gas, no back firing, no codes, no shifting issues. Things i do notice is little rough when it's cold but after say 10 mins the engine is flawless running, the issues just stared one cold day and has done it every sence. Was getting normal gas like 17-19 in city and 20's on highway over the whole summer. Any help or ideals what to check would be awesome, and also friend said to seafoam it might help what you guys think?