Oil analysis

185EZ wrote:

udidwht wrote:

185EZ wrote:

udidwht wrote:

185EZ wrote:

Maybe the oil is still "good" but to keep any oil in a motor for over a year is just asking for problems.
There is still stuff in the oil that's hard on seals and gaskets.

Again incorrect. A simple search can provide a lot of info on this.

There is not a single engine that has ever had an oil related issue as a result of going 6000-7000 miles.

Never. Fact.

Changing the oil more often than necessary has consequences. Oil requires some miles to be put on it before it actually lowers wear effectively vs 100% virgin oil out of a bottle. Much the same with an oil filter. A filter filters better after haven been in the engine for 1000 miles+.

A finding of high copper alone is not an issue and quite common unless other abrasive wear metal/s such as iron, aluminum, chromium, etc. are present at higher than normal levels.

Some reasons for high copper level:

1. Oil cooler/s (GM oil leaching from cooler)
2. Radiator/s tubing
3. Leaks from radiators (no leak in mine)
4. Oil additive/s

The above instance (high copper) would also be showing other higher than average wear metals & contaminates in an analysis if there were an issue. Copper in and of itself? No. Normal.

Again nope.
I never said anything about oil issues with oil going 6000 to 7000 miles. My manual suggests 7500 miles. I'm not going to send in an analysis to find out if I can still run the oil after that. I'd rather spend the $50 and just do an oil change.
I also said keeping old oil in the motor for over a year isn't a good idea.
Is 20w50 recommended for your climate?

edit;
I can't find anything that suggests oil and filters are more effective after 1000 miles.
If that's true then you sent in for an analysis at only 2,720 miles
Only thing I heard was KN air filters would do that.

The media of an oil filter will increase it's ability to trap fine particles better after haven been ran in an engine for some time. Larger holes fill and decrease in size over a period of time increasing the filters filtering efficiency.

It's similar with air filters as well. As they dirty they filter better. The RV I own I purchased used so I do an analysis from time to time. The price of an analysis is a drop i the bucket in terms of what most of us spend on these rigs.

My thought is if one gripes over the cost of even (1) then RV's aren't for you.

Used 20W-50 due to the local FLAPS not having the viscosity at the time of purchase. BBC have no issue with it.

If I could extend oil intervals to every 3 years that saves me time & money. Newer oil doesn't work better if the current oil is still doing it;s job just fine. The TBN is the number to look at.

A good read:

https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/