It not only lubricates the engine, it also cools, cleans and protects it. But mineral oil by itself can't do all of these jobs without some help. Nearly half a pint of various additives are added to the typical quart of mineral oil to improve the oil's ability to resist heat, friction, oxidation and contamination. Short trip driving is especially hard on oil because the engine never warms up enough to boil off the moisture that accumulates inside the crankcase. But in a cold engine much of the moisture condenses and ends up in the oil.
Water reacts with oil to form sludge and acids, and the result is accelerated engine wear.
My Car s Running Fine. Improper tire inflation wears tires faster and wastes fuel because the engine has to labor harder to move the vehicle. Improper tire alignment can wear out your tires more quickly. The more timely vehicle servicing you do, the more money you save in the long run. The longer you wait until you service, the harder your car has to work.