Originally posted by jd140
My HD gets a service every 2000 miles if it is hot outside and 3000 if it is cold. It gets a complete fluid change every other service. I have had it
for 5 years and have put 30,000 miles on it and it runs wonderfully.
Interesting, but i think you will find that it is better to change the oil more offer in the winter instead of the summer.
Modern oils don't break down that fast because of heat.
But water in the oil does affect it. In the winter the humidity is higher and the engine temps fall lower when the engine is not running.
this will cause condensation inside the engine and this water will get in the oil.
This can be seen as dew on plants in the morning. You don't see it as much in the summer as you see it in the winter.
In the summer cars run hotter people drive more and the humidity is lower and this evaporates most of the water that might get into the oil on a daily
Water in oil will break down the additives.
And replacing the additives by changing you oil is more important then because your oil breaking down for a reason to do a oil change.
The oil will in most cases protect your engine 3 to 4 times longer then the standard oil change period.
But after the standard oil change period the additives are used up and the dirt and wear metals have built up to a level that may start damaging the
One group of additives are detergents these keep metal particles and dirt floating instead of settling out and building up in the engine. This is so
that as the oil filter will catch these particles.
This is why you never used detergent oil in the old pancake VW engines that had no oil filter. Its also why these VW engines did not last as long as
With detergents in oil most of the particles were ether trapped in the filter or removed by oil changes.
Without detergents these particles are not removed by the filter and sink to the bottom and buildup in the engine sludge over the life of the
if you go 10,000+ between oil changes you will have a lot of this dirty sludge.
If something breaks up this sludge like a oil change all that dirt will be released and over load the filter.