Mobil 1 20,000 mile oil change.

[clemsonfor]

Last time I changed plugs in the BMW (a high compresson engine requiring 95 RON octane fuel), they were 13 years old...Autolite 3923s, the cheap ones. The old ones came out almost like new. I never use multi electrode plugs because most do not allow for gap adjustment. For me, high priced noble metal plugs offer no benefit.

I don't use multielectrode plugs either but gladly use double platinum or iridium plugs in hard to get to vehicles.

 

[clemsonfor]

Likely, they track how long the fuel injectors are open for and how many revolutions the tires make.
That should be as accurate as hand calculating mileage because it's using the same source as your trip meter and odometer for miles traveled and it should be pretty accurate with how much fuel is used based on how long the injectors are open. I do not understand why exactly they would be incorrect but there are some that are perpetually incorrect. The one in my car is pretty accurate, the only inaccuracies would be where I leave the average fuel mileage going for multiple tanks so if I have a tank with lots of running around town it will still read a little bit higher from the previous tanks that had more highway mileage.

Aaron Z

My Toyota Highlander its a 2001 model the mpg is accuate close as far as the life of that count. It does not count each tank, but I believe it to be close as far as the life of that reading is.

My work truck is a 2016 dodge Ram. It has a lifetime reading and a trip reading actually 2 trip readings. Neither is correct!! If its straight highway miles and very little idling or stopping it is way closer than a mixed tank or a tank with lost of idling or city. I have no idea why? I do the mileage by hand every time I fill it up. I reset the trip everytime as well, it is consistently off .5 to 1.5mpg which may not sound like much but on a tank that may average 16 to 18 mpg and 21mpg at best on a 2 lane highway that is a substantial difference. if you get 18mpg on the computer and its 1.5 lower that's close to 8% off!

 

[wooddude 2]

I use Amsoil in everything. Have for 10+ years. Once a year I change oil and filter.
Over 200,000 on a ford van. Saves me lots of money with time it takes to change on the other intervals. Increase in calculated gas mileage.
Amsoil was first synthetic
Used Amsoil in my Deere x485 hydraulic and all the noices went away.
Wooddude

 

[Midniteoyl]

Amsoil was first synthetic

Wooddude

First to market a API rated synthetic (relabeled Mil Spec oil if I recall) in the US, not the first to make it or sell it.

 

[mguitas]

I use Amsoil in everything. Have for 10+ years. Once a year I change oil and filter.
Over 200,000 on a ford van. Saves me lots of money with time it takes to change on the other intervals. Increase in calculated gas mileage.
Amsoil was first synthetic
Used Amsoil in my Deere x485 hydraulic and all the noices went away.
Wooddude

Welcome aboard wooddude2, I use amsoil too.

 

[2ndhalf]

Buy a new Subaru and never change your oil.. just keep adding a quart every 1,000 miles as required : ) I traded two of the new oil burning Subarus before the class action suit was settled.

 

[cowpie1]

The NOACK test cooks a known weight of the oil under test at a predetermined temperature for a predetermined time defined by ASTM D5800. The remaining weight of oil at the end of the test is a percent of the original sample weight, but you know this already. A good NOACK usually indicates that you won't need a top up between oil changes. Also, a good NOACK means the oil is likely to stay in grade longer. Also, a UOA viscosity analysis indicates to what degree of shearing the oil may be undergoing.

My most severe motor oil application is likely my 1130 cc, BMW air/oil cooled boxer twin motorcycle engine. Oil is used as the cooling medium and is deliberately circulated around the exhaust valve pockets to waste excess heat from those high temperature areas. Oil temperatures are controlled using a thermostated oil cooler in the air flowing under the headlights. Next is the air cooled B&S 724 CC V twin riding mower engine, also air cooled but without the benefit of an oil cooler. Both of these engines use synthetic engine oil. Neither requires topping up between extended oil changes.

Yes, I am quite aware how NOACK test is done and why. Problem here is that any spec sheet shows the percent loss as opposed to your position of percent remaining. You should stick with industry standard presentation. No spec sheet I have seen recently shows, say, 95% remaining but will show 5% loss for the NOACK. We should at least stick with standardized presentation so that other folks who are not that familiar with this sort of thing don't get confused.

 

[newbury]

Buy a new Subaru and never change your oil.. just keep adding a quart every 1,000 miles as required : ) I traded two of the new oil burning Subarus before the class action suit was settled.

I do that with my '88 E350 and transmission fluid. Been leaking since '92

 

[def38]

Yes, I am quite aware how NOACK test is done and why. Problem here is that any spec sheet shows the percent loss as opposed to your position of percent remaining. You should stick with industry standard presentation. No spec sheet I have seen recently shows, say, 95% remaining but will show 5% loss for the NOACK. We should at least stick with standardized presentation so that other folks who are not that familiar with this sort of thing don't get confused.

You are correct. I guess I'm a glass half full guy, not a glass half empty type.

 

[vsteel]

wow ! he never buys used ? that means he always buys new and gets screwed as soon as he drives it off the lot. All I buy is used, after those like him take a beating

Only matters when you sell it. I buy brand new as well so I don't get someone else's mess. Though I am still driving my pickup I bought new in the fall of 1990 so I have not seen a beating from it yet. Though I have had great luck with it and only replaced wear items. As soon as I sell a vehicle I will let you know how the beating goes. (some of us who buy new keep vehicles measured by multiple decades, not years.)