View Poll Results: Oil Change, 3k or 5k?
Change oil every 3k using Motorcraft 15W40
5
19.23%
Change oil every 5k using Rotella Synthetic 5W40
21
80.77%
Voters: 26. You may not vote on this poll
Oil Change Question
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
Absolutely not.
Changes of oils are required because of chemical contamination. If you read more -base of oil is fully recyclable but the process is too complicated to do it on the car.
So having filters we don't have to worry about mechanical contamination.
New oil come with chem and detergent pack, that is calculated for certain life in the engine.
When you pour new oil it is having overdose of chemicals to neutralize engine acids. About 1/2 of design life the oil comes to perfect balance and than engine acids slowly overcome unless you add some new oil.
So if you change the oil prematurely -you dump perfectly balanced oil and give the engine overdose of new chemicals.
In another words you are killing your engine. The effects are minimal, so nobody will notice shortening the engine life to only 500,000 miles, but you make oil industry banks account growing.
Changes of oils are required because of chemical contamination. If you read more -base of oil is fully recyclable but the process is too complicated to do it on the car.
So having filters we don't have to worry about mechanical contamination.
New oil come with chem and detergent pack, that is calculated for certain life in the engine.
When you pour new oil it is having overdose of chemicals to neutralize engine acids. About 1/2 of design life the oil comes to perfect balance and than engine acids slowly overcome unless you add some new oil.
So if you change the oil prematurely -you dump perfectly balanced oil and give the engine overdose of new chemicals.
In another words you are killing your engine. The effects are minimal, so nobody will notice shortening the engine life to only 500,000 miles, but you make oil industry banks account growing.
