Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [lubrication]

71 questions
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5 answers

What differences between synthetic and dino oil?

What are the main differences between synthetic and dino oil? Is one always better than the other?
alex
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16
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Is Anti-Seize a lubricant, abrasive, or both?

I'll flesh my personal bias at the outset - being a heavy diesel mechanic for a time, and mechanically inclined my entire life, I use Anti-Seize wherever I can. If it has threads and it's not part of a rotational mass like a driveshaft, clutch, or…
Ehryk
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Does Vaseline dissolve rubber?

Recently, someone suggested that I apply some vaseline to an O-ring connection to see if I can find a leak. I've read that oil-based lubricants, especially vaseline, can desolve rubber. It seems like a bad idea to do this. Does vaseline (or any…
Lynn Crumbling
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How does ambient temperature affect engine efficiency and fuel consumption?

I remember from my physics class that the ideal-gas Carnot engine is more efficient if the temperature difference between the heat source and the thermostat ("heat recipient") is larger…
ponadto
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11
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5 answers

Should I use open engine oil that was left over from previous oil change

So, I have accumulated 4 Liter engine oil which are left overs of previous oil changes. I have accumulated these amount in 1 year. So should I use it or not? I use Mobil 1 full synthetic 0w 40. Please give me suggestions.
Sadat Mainuddin
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11
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6 answers

How to stiffen up a loose ball & socket joint for a motorcycle mirror?

I have bar-end mirrors on my Buell 1125CR. They're fairly heavy anodized aluminum pieces that pivot on a ball & socket joint for adjusting the angle of view. One of them fits snugly on the joint, so I can adjust it and it stays in place as I'm…
Bungle
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How does the change oil light system work and does it matter what type of oil you use for it to work properly?

I want to know if the methods a vehicle decides when to turn on the oil change light have to do with the qualities of the motor oil used in the last oil change. I have heard that the vehicle's computer calculates when the oil change light turns on…
Steve Moser
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Okay to add new oil to old?

Title pretty much explains, I change my oil every 4-6k miles depending on how generous I’m feeling, however will the oil dirty oil that’s already in the sump mix with the clean oil when topping up? Normally I just top up but in this case I have…
ceefax12
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9
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What prevents engine oil from mixing with petrol in motor bikes?

Engine oil is used in the lubrication process, at the same place petrol is also there. What prevents engine oil mixing with petrol in motor bikes?
Donnel Countess
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Should lost CV gaiter grease be replaced?

I discovered a small hole, possibly a puncture, in an outer CV gaiter on the front. The hole was right next to/under the (outer) metal ring holding the CV gaiter, so it wasn't in a very flexible bit. There was quite a lot of oily grease splattered…
Řídící
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5 answers

Is WD40 a penetrant?

An outer tie rod is bound (screwed into) the inner tie rod as described in this previous posting. WD40 was sprayed at connection between the two tie rods and the jam nut was loosened. Attempts to unscrew the outer rod were unsuccessful. Is WD40 a…
gatorback
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Which grease should I use on wiper mechanisms?

The front wiper mechanism on my 1988 Porsche 944 has become a bit slow moving and I plan to fix it. On my car the wiper crank arms go through sockets in a frame, the crank arms are moved back and forth by linkages attached to a motor. I plan to…
GdD
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Effects of sunlight on engine oil

I have a 5 litre bottle of oil out back that I was going to top my car up with when I realised it's been out on the sun for about a month, the bottle is opaque and does not let sunlight through (apart from a slit in the front to show the remaining…
ceefax12
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What type of Brake Lube to use

I am going to do a DIY brake job on my car and am trying to sort out how to lube everything. I found this helpful list of places to lube: What brake components need to be lubricated? but it does not mention what type of lubes to use. On my car, the…
Charles L.
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Heim joints with zerk fittings

On my truck I have heim joints setup in the steering to provide additional strength. Currently I have a 3/4 by 3/4 heim with teflon coatings, and with the mud and dirt where I live, they are getting harder to maintain over time. I have considered…
John
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