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Author Topic: Engine Maintenance Tips: Additives & Oil  (Read 96484 times)

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Offline St Giles

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Re: Engine Maintenance Tips: Additives & Oil
« Reply #15 on: December 25, 2025, 08:59:39 PM »
And it's not auto connecting to wifi or bluetooth without you realizing? Maybe it was the D8 that had the 1 month problems.

I'll have to look again, but one scan tool I was looking at scared me because some people had it malfunction and damage the computer on multiple cars before they figured out the tool was broken.
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Offline St Giles

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Re: Engine Maintenance Tips: Additives & Oil
« Reply #16 on: December 25, 2025, 09:04:22 PM »
Quote from: Yeti on December 24, 2025, 10:16:52 AM


The long warm-up when starting a cold engine is actually bad for the engine because it prolongs the amount of time it takes for the engine to warm up, and most engine wear occurs when the engine is cold. I used to have a car that had an oil pressure gauge, and I noticed that it took about five seconds for the oil pressure to reach the proper level, so when I start the car cold I give it about 5-10 seconds for the oil to reach the right pressure and then I start driving. I do avoid revving the engine high when it's cold, though; that's probably reasonable.

I avoid high revs when cold thinking the oil may cavitate or something when thick, but I'm probably wrong on that a least when using the right viscosity at the right temp.

Mr. Oil Geek said nothing so much about wear from a cold engine than just more blow by causing fuel, water, and soot to get into the oil, and not evaporating out of the oil if the engine never fully warms up, backed up by some tests of course.
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Offline Seraphina

Re: Engine Maintenance Tips: Additives & Oil
« Reply #17 on: December 26, 2025, 05:18:03 AM »
I like older cars that have been well maintained and it’s as few bells and whistles as possible.  I’ve never bought a new car, never will. 
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Offline St Giles

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Re: Engine Maintenance Tips: Additives & Oil
« Reply #18 on: December 30, 2025, 05:15:57 PM »
Quote from: St Giles on December 12, 2025, 08:56:06 PM
 Cold, and sitting for years, can cause the built-in additives to separate out, which are not easy to mix back in (shaking the bottle does almost nothing). 
I tested an idea for mixing the settled out additives in new oil bottles, and it worked well.

I warmed a jug of oil in a pot of water on the stove, and once it was very warm, which took 20min or so, I held it upside down and shook it vigorously. Using a powerful flashlight shining through the jug while upside down, I confirmed that there was sediment stuck to the bottom, and that it was gone after shaking. Warming is necessary, because room temperature oil is almost like syrup, while hot oil is at least as thin as water.
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Offline Freind

Re: Engine Maintenance Tips: Additives & Oil
« Reply #19 on: December 30, 2025, 06:00:59 PM »
I haven't read the whole thread here, but one tip I can mention is that you shouldn't trust an oil change business to put the correct oil in your car. 

Unless it is a bigger establishment, like a car dealer of your type of car.

But these quick lube places should be avoided, unless you buy your own oil and bring it in to them and after they drain, watch them pour your oil in the engine.
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