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Oil changes, safety recalls, and software updates

daemonology.net

11–20 of 61 posts

Re: Oil changes, safety recalls, and software updates

#11

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

Changing the oil that frequently probably won't hurt but in a modern car with synthetic oil it's entirely unnecessary.

Re: Oil changes, safety recalls, and software updates

#12
post #6

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

How would changing oil every 2 000 km be a problem? Modern oil should last 10x that long without any problem. I am used to having recommendations for changing oil once a year or every 15k km depending on what comes first. I remember recommendations to change 2 times a year 15-20 years ago because it back then was more normal to have different viscosity in summer and winter

The sticky sludge that GP refers to is for the most part an emulsion of water, produced by combustion and/or from ambient humidity, and oil. If an engine is not run frequently or is used only for short intervals the water isn't driven off by engine heat. Engines that aren't run much must be maintained based on elapsed time, not duration of use, due to factors such as this.

The author's vehicle is a prime sludge candidate, although not as bad as people who go years w/o changes.

Loss of viscosity is a wholly separate form of degradation which along with accumulated Ph changes is responsible for the "every N miles" recommendation.

Re: Oil changes, safety recalls, and software updates

#13

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

It's funny how attitudes towards oil change are different in different countries. In Germany, I would never go to the garage just for an oil change. We do an oil change either at the scheduled inspection, or when we're at the garage anyway (for winter tires) and the mechanic says it's time :-) which is about once a year. My last car was a bit of a beater, and we did the oil change more frequently. Reason was that it…

Well, I had a German car (diesel engine) for 12 years and changed oil according to the board computer, it came out roughly on average around 32,000 km, i.e. a little bit more than 1 year (sold it with 300,000 km after 12 years).

But the oil of a manual transmission (and as well that of an automatic one) is normally separated from the engine oil, do I read it correctly that you had a car with those in common?

All cars have one or more magnets (for ferrous shavings)it is perfectly normal, but of course they are pretty much ineffective for other metals, and more generally other possible contaminants.

Re: Oil changes, safety recalls, and software updates

#14

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

You must have missed that he drives 2000 not 20000km per year. He says he changes oil around every year, so every 2000km (1200 miles).

If he changed every 6 months, he'd be changing every 1000km. That's insane! I don't even refuel every 1000km!

Example oil change schedule for a modern car (Taken from Audi Q7 '09 service manual): 8.000km, 25.000km, 40.000km, 55.000km...

So ~15.000km between changes - or 7.5 years if you drive 2.000km per year. Now - obviously you wouldn't go 7 years without an oil and filter change but you should be completely fine changing every 1-2 years on a car that is driven so little (It's the aging of the oil that's the problem, not the distance driven)

Re: Oil changes, safety recalls, and software updates

#15
post #7

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

I always wondered how this oil-change scam still continues in the US. Modern cars with synthetic oils don't need an oil change every 3-4 months or 3000 miles. I always changed the oil according to the (European or Japanese) manufacturer's schedule (once a year / every 10-15000km) and had no issues with the cars (even >10 years old cars).

Is there a difference though? If you see my other reply to the parent, I posted the US oil change schedule for a european car. It seems to be in line with what I experience in europe .

Is it a difference between european and US made cars?

Re: Oil changes, safety recalls, and software updates

#16

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

>That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

Or actually, the car will be perfectly fine. Nobody changes their cars every 3-4 months in this here parts, and the sky hasn't fallen.

Re: Oil changes, safety recalls, and software updates

#17
post #7

Earlier quoted context omitted.

I always wondered how this oil-change scam still continues in the US. Modern cars with synthetic oils don't need an oil change every 3-4 months or 3000 miles. I always changed the oil according to the (European or Japanese) manufacturer's schedule (once a year / every 10-15000km) and had no issues with the cars (even >10 years old cars).

Is there a difference though? If you see my other reply to the parent, I posted the US oil change schedule for a european car. It seems to be in line with what I experience in europe . Is it a difference between european and US made cars?

I know nothing on the matter, but it seems to me that it's a cultural difference. Americans are just more used to changing the oil often, so oil companies can sell them more oil even if they don't need it.

Re: Oil changes, safety recalls, and software updates

#18
post #2

I'll admit to putting off applying security patches because my laptop is a giant repository of state and it's a pita to bring it all back up again. I have to remember how to start postgres, the erb command to make rails work, figure out how my upgrade to bash subtly broke virtualenvwrapper, make sure I didn't accidentally leave anything open in vim in some random window or go through the whining about vim swap files,…

Do this, and you'll thank me:

https://www.stavros.io/posts/provisioning-your-computer-one-...

Re: Oil changes, safety recalls, and software updates

#19
post #7

While I totally agree with most of the article, it made me grind my teeth at the frequency the author changes the oil in their car... That poor valvetrain will be full of gummy carbon deposits. RIP whoever buys the car second-hand.

I always wondered how this oil-change scam still continues in the US. Modern cars with synthetic oils don't need an oil change every 3-4 months or 3000 miles. I always changed the oil according to the (European or Japanese) manufacturer's schedule (once a year / every 10-15000km) and had no issues with the cars (even >10 years old cars).

Most people don't use synthetic oil.

In my case, it's cheaper to use non-synthetic oil and change it quarterly, which generally aligns with other maintenance activity. (Tire rotation, filters, lights, etc)

Re: Oil changes, safety recalls, and software updates

#20
post #7

Earlier quoted context omitted.

I always wondered how this oil-change scam still continues in the US. Modern cars with synthetic oils don't need an oil change every 3-4 months or 3000 miles. I always changed the oil according to the (European or Japanese) manufacturer's schedule (once a year / every 10-15000km) and had no issues with the cars (even >10 years old cars).

Is there a difference though? If you see my other reply to the parent, I posted the US oil change schedule for a european car. It seems to be in line with what I experience in europe . Is it a difference between european and US made cars?

It's a difference in the oil used.

The standards for oil are tightly regulated in the EU.

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