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Message
1
Posted on 7/22/21 at 10:57 pm to Cycledude
Oil is also a detergent these days. It cleans the soot and grime out of an engine. You’ll notice that oil can darken even after running only a few minutes after a change.
But it’s doing it’s job. Cleaning.
I consider my oil, the blood of my car. Changing in suggested intervals doesn’t hurt anything but going outside of those intervals runs more soot and sludge through your engine for longer periods of time. Why do it?
People that go with extreme intervals risk mechanical failure due to the oil viscosity breaking down.
Get a $75 oil change 4 times a year and enjoy your vehicle for the long term. Change your ATF with a complete flush every 60k miles
I sell motor oil for a living.
But it’s doing it’s job. Cleaning.
I consider my oil, the blood of my car. Changing in suggested intervals doesn’t hurt anything but going outside of those intervals runs more soot and sludge through your engine for longer periods of time. Why do it?
People that go with extreme intervals risk mechanical failure due to the oil viscosity breaking down.
Get a $75 oil change 4 times a year and enjoy your vehicle for the long term. Change your ATF with a complete flush every 60k miles
I sell motor oil for a living.
Posted on 7/22/21 at 11:10 pm to Cycledude
quote:
Why is time important to change motor oil?
I actually have thought about this a lot lately, and have recently changed my stance on the issue. I have always thought the only thing breaks down the lubricating properties of oil was mileage, because the oil simply gets dirty. I am now convinced heating and cooling cycles break down the viscosity index and it loses its lubricating properties. I now think many short trips is worse on motor oil then one long trip. The only way to try to measure service life of oil is to cap miles driven and time.
I do not think motor simply gets old and loses its lubricating ability.
Posted on 7/22/21 at 11:15 pm to Cycledude
I have always heard from about 5,000 for standard and 7,500 for Synthetic…. 
Posted on 7/22/21 at 11:31 pm to dhuck20
quote:
I have always heard from about 5,000 for standard and 7,500 for Synthetic….
Why not just follow the manufacturers recommendations in the owners manual. The manufacturer has a vested interest in recommending what is best for the engine. They are responsible for the cost of engine warranty repairs, and also unlikely to recommend anything that would decrease the reliability of their vehicles.
We have a Lexus,and a Tundra, both known for reliability both recommend 10,000 mile oil change intervals with synthetic oil, so that’s what we do.
Posted on 7/22/21 at 11:44 pm to Cycledude
Full synthetic 10,000 miles between changes is fine. Oxidation is what darkens it. Ethanol is an oxygenator for gasoline, if ethanol free another oxygenator is used, just no longer MTBE
Posted on 7/23/21 at 7:57 am to CitizenK
I have had 3 vehicles make it to over 350k with oil changes at 10-12k. The first two I used the 5 minute oil change place and told them to put the cheapest oil they have in it. The current car, I’ve been doing them myself with full synthetic. Zero difference and zero issues.
3-5k is ridiculous. Is it better for the car than every 10-12k, probably on a microscopic level, but I don’t know many people who drive more than I do and I have not seen anything detrimental.
3-5k is ridiculous. Is it better for the car than every 10-12k, probably on a microscopic level, but I don’t know many people who drive more than I do and I have not seen anything detrimental.
Posted on 7/23/21 at 9:02 am to billjamin
quote:
Modern oils are not nearly as unstable as previous ones. If you use a decent product, as long as you're not going over a couple years, you're fine.
But seriously just drop it every year even if you're not hitting the mileage requirement. The ROI just isn't there to push the limits on a car you drive that little.
I can’t speak to automotive engine oil, but I know Caterpillar has developed its Diesel Engine Oil to where the oil change interval in most models was pushed from 250 hours to 500 hours several years ago. And now I’ve seen test results where they’re getting even higher oil change intervals without any adverse effects on the engine.
Posted on 7/23/21 at 10:14 am to The Levee
quote:
Why not change your oil filter every time?
Two reasons really.
One, an oil filter actually filters best right up to the moment it hits bypass pressure. That won't happen in a very clean 250k mile engine. So it returns better oil analyses going this route.
Two, I have a bunch of 3/16 steel skid plates and they are heavy as shite. Once every six months is easier to tolerate
Posted on 7/23/21 at 10:16 am to Jor Jor The Dinosaur
quote:
I thought that "they" said
don't drag me into this
Posted on 7/23/21 at 10:17 am to X123F45
quote:
Two, I have a bunch of 3/16 steel skid plates and they are heavy as shite. Once every six months is easier to tolerate
I can sympathize with that.
Posted on 7/23/21 at 10:20 am to Cycledude
Poster 2 nailed it with oxidation
Also, need to consider your driving conditions (traffic idle time, dusty air, temp extremes, etc.), over time
Also, need to consider your driving conditions (traffic idle time, dusty air, temp extremes, etc.), over time
Posted on 7/23/21 at 8:44 pm to latech15
It's not just oil. They dump crumb rubber and melt it into base oil, along with other additives. Its a several step process.
Synthetics are free of aromatic hydrocarbons with almost all of the paraffins being branched. Aromatics degrade lubes all by themselves. GTL produced base oil is the purest of synthetics. The others are base oils which have been catalytically altered to be able to be called synthetic. There are also Poly Alpha Olefins.
Synthetics usually have a small amount of vegetable derived oil added, It helps stabilize the lube oil.
Racing cars use synthetics with single wall carbon nanotubes due the high heat generated. Heat degrades lube oil.
Synthetics are free of aromatic hydrocarbons with almost all of the paraffins being branched. Aromatics degrade lubes all by themselves. GTL produced base oil is the purest of synthetics. The others are base oils which have been catalytically altered to be able to be called synthetic. There are also Poly Alpha Olefins.
Synthetics usually have a small amount of vegetable derived oil added, It helps stabilize the lube oil.
Racing cars use synthetics with single wall carbon nanotubes due the high heat generated. Heat degrades lube oil.
Posted on 7/23/21 at 8:45 pm to Cycledude
It’s not important as long as you don’t like having a car
Posted on 7/23/21 at 8:49 pm to Cycledude
quote:
but why every year?
Are you a woman?
Posted on 7/23/21 at 8:50 pm to CitizenK
quote:
Synthetics are free of aromatic hydrocarbons with almost all of the paraffins being branched.
Captain chemistry, recommend the following language to help others understand synthetics vs. mineral oils...
Mineral oil molecules are wide variety of shapes and sizes, analogous to big and small rocks, jagged, and differing in shape
Synthetic oil molecules are like a pack of marbles, same size, shape, and "smoothness"
This yields many benefits, including oil application effectiveness including protection, cooling engine, some fuel economy, oil stability and durability (thank you, additives!), etc.
Posted on 7/23/21 at 9:04 pm to Turf Taint
You’re supposed to change the oil? shite…
Posted on 7/23/21 at 9:06 pm to Turf Taint
My mom drives 2,500 miles a year and she drives almost everyday. I change the oil once a year. The problem is that after 9 months the car tells her she has to change her oil since the oil life is 0%. I finally convinced her that car's computer was a scam.
Posted on 7/23/21 at 9:10 pm to Ralph_Wiggum
Honestly, I always did it pretty religiously at 5y/5k but upon buying my last Honda, I researched it a bit since it gives a percentage instead of a mile total. From what I read from certified mechanic, they said that the Honda algorithm and sensors was very accuracy and to follow it. So I do. My last synthenthic has me at 10k, much of it highway miles, and 30% life left. I’ll probably change it soon.
Posted on 7/23/21 at 9:25 pm to Ralph_Wiggum
Miles are irrelevant or corollary at best, the car's computer calculates it on engine revolutions and temperature trends, basically oil circulation and stress.
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