On cool days,watch a vehicle going down the road after 1st starting. Notice that dribble of water coming out of the tail pipe. Then figure out where that water comes from.
In additon all these 15-20,000 mile fans probably do not change the air filter still at 10-15K intervals as recommded.Some of that dust gets in the oil that filters do not all filter out.
These fancy oils, although they do not break down,they still get contaminated. Water and dirt are the cupprits. But hey, it's your$40-$50 K vehicle. Save that $50 for an oil change.Once a year for 20 years will save you a whopping $1000,if your engine lasts that long.
Well I've been doing that on my vehicles...
a 94, so that is 21 years old...
a 93, so that is 22 years old...
an 88, so that is 27 years old...
and yeah, the engines have lasted that long and don't have sludge issues, as I replace valve cover gaskets every 50K, if they don't need them sooner...
