I am making a 200-mile trip tomorrow morning in my 2015 Honda Fit and carrying about 700 lb counting my own weight. Should I increase the PSI in my tires? If so what would you recommend?

 

No just keep the tires at the manufacturer PSI rating for best results.

 

No. Tire pressure should be the same.

 

I think this is the best answer. But there’s not really any issue keeping the tires at normal pressure for just one or two trips

 

Actually, 700 pounds is a lot. The maximum load is 850. If my hatch area does not have a lot of weight I will make the rear tires a pound or 2 less than the front. With a lot of weight, I'll make them the same. The spec for 2015 listed in my owners manual is 33 front 33 rear but I with a light load I fill to 35 front 34 rear. When I check the pressure after 2 months it will be down about 3 pounds in each tire. So 32 front 31 rear, or even less. So the average pressure over 2 months will be close to the recommendation. Always check when the tires are cool. Tires facing the sun will get very warm, and gain about 2 psi, so check in the morning, If Ifill the tires in the morning when it is 70 degrees F outside, they will lose about 2 pounds if the temperature drops to about 20 degrees F. They will gain 2 pounds when they feel warm, on a long road trip.