Oil change once a year regardless of miles???
Registered User
Joined: Aug 2008
Posts: 160
From: socal
Rep Power: 26
considering every 3k miles is a lie, i'd say a change every year is also a lie. driving your car about 15 minutes once a week is fine. oil doesnt break down just sitting there
Registered User
Joined: Oct 2006
Posts: 1,403
From: South Pasadena, CA
Rep Power: 78
Im just using common sense...whatever that means...I would probably err on the side of changing the oil once a year no matter what.
I usually do not drive my car much either...but I know it needs an oil change soon....just better to do it as it is cheap insurance on the life of the car.
I usually do not drive my car much either...but I know it needs an oil change soon....just better to do it as it is cheap insurance on the life of the car.
Registered User
Joined: Feb 2009
Posts: 35
From: usa
Rep Power: 19
I probably drive 10-12k a year and i do a change 4 times a year,I change every 90 days,I change when the seasons change (we have 4 full seasons) oil changes are inexpensive for the protection it provides. Just my .22 cents worth
Registered User
Joined: Aug 2007
Posts: 205
From: North TX
Rep Power: 27
Frequent oil changes are not always a good thing. If changed too frequently, then it can actually accelerate engine wear. This is an interesting read:
The poster that mentioned Doug Hillary's name is spot on. Search his name on BITOG and read his posts. He seems to have quite a bit of knowledge regarding oil and Porsche M96 engines.
///Michael
Engine wear actually decreases as oil ages. This has also been substantiated in testing conducted by Ford Motor Co. and ConocoPhillips, and reported in SAE Technical Paper 2003-01-3119. What this means is that compulsive oil changers are actually causing more engine wear than the people who let their engine's oil get some age on it.
///Michael
Registered User
Joined: Feb 2009
Posts: 35
From: usa
Rep Power: 19
well if frequent changes are not good.....then why put in new oil? I cant say i would agree with that article, it is just an opinion, we used to race midgets and sometimes change oil twice in a day, we never lost a motor..again another opinion 
Registered User
Joined: Jul 2006
Posts: 3,001
From: NJ
Rep Power: 150
I had a supra 91, changed the oil maybe 6 times in all of its 220K miles (and still drove like new, when I sold her) everything original, clutch wheels... till this day I cant figure out how that was possible. Maybe, the article mentioned has validity...
Note: I did however always topped her off with fresh oil when needed... but like I said... only changed oil like 6x.
Note: I did however always topped her off with fresh oil when needed... but like I said... only changed oil like 6x.
Registered User
Joined: Feb 2009
Posts: 35
From: usa
Rep Power: 19
i suppose if it leaks enough or burns enough oil and you keep topping it of...well thats like fresh oil
i had a truck that leaked a qt a month, thats like 2 oil changes a year I suppose if you torture the data long enough you can make it say anything.
i had a truck that leaked a qt a month, thats like 2 oil changes a year
I suppose if you torture the data long enough you can make it say anything.
Registered User
Joined: Aug 2007
Posts: 205
From: North TX
Rep Power: 27
Abstract:
The overall purpose of this research is to determine the antiwear capability of low phosphorus engine oils containing 0.05 wt% phosphorus. The antiwear performance of 0.05 wt% phosphorus engine oils was evaluated using a laboratory valvetrain bench test rig coupled with an on-line wear measurement technique and a high frequency reciprocating rig (HFRR). Low phosphorus engine oils were compared with GF-3 engine oils containing 0.1 wt% phosphorus. In addition to fresh oils, long drain used oils from fleet vehicles were also analyzed and investigated. This information is important to develop engine oil formulations to meet the latest government emission and fuel economy requirements. The results indicate that by appropriately selecting and balancing supplemental antiwear and/or antioxidation additives the wear loss due to the reduction of zinc dialkyldithiophosphate (ZDDP) may be compensated or even reduced.
The overall purpose of this research is to determine the antiwear capability of low phosphorus engine oils containing 0.05 wt% phosphorus. The antiwear performance of 0.05 wt% phosphorus engine oils was evaluated using a laboratory valvetrain bench test rig coupled with an on-line wear measurement technique and a high frequency reciprocating rig (HFRR). Low phosphorus engine oils were compared with GF-3 engine oils containing 0.1 wt% phosphorus. In addition to fresh oils, long drain used oils from fleet vehicles were also analyzed and investigated. This information is important to develop engine oil formulations to meet the latest government emission and fuel economy requirements. The results indicate that by appropriately selecting and balancing supplemental antiwear and/or antioxidation additives the wear loss due to the reduction of zinc dialkyldithiophosphate (ZDDP) may be compensated or even reduced.
///Michael