Change your oil!!!!!!!!!!!!!!!!!!!!!

[CHUD]

Unlike just about everyone else, I use elapsed time (every 100 hours) to determine when to change my oil. I figure if it is the standard for most other motorized conveyances such as boats, airplanes & even lawn mowers, then it should be the standard for a car engine as well. Problem is it's not easy to guage ET without a timer. BTW, it takes me about 20 months to put 3000 on my KJ so I best not use mileage as a barometer.

 

[Dave]

Unlike just about everyone else, I use elapsed time (every 100 hours) to determine when to change my oil. I figure if it is the standard for most other motorized conveyances such as boats, airplanes & even lawn mowers, then it should be the standard for a car engine as well. Problem is it's not easy to guage ET without a timer. BTW, it takes me about 20 months to put 3000 on my KJ so I best not use mileage as a barometer.

If you have an EVIC you can reset the timer and it will register hours, minutes, seconds that the engine was running between oil changes.

Dave

 

[67Customs]

Unlike just about everyone else, I use elapsed time (every 100 hours) to determine when to change my oil. I figure if it is the standard for most other motorized conveyances such as boats, airplanes & even lawn mowers, then it should be the standard for a car engine as well. Problem is it's not easy to guage ET without a timer. BTW, it takes me about 20 months to put 3000 on my KJ so I best not use mileage as a barometer.

That is defferent though. If it take you over a year to rack up 3K miles, then you obviously need to go by time.

I put 5K on my Jeep every 4-5 months. I can go by mileage.

Just depends on how you drive.

That is why there is no standard oil change interval for every single driver and every single vehicle.

It's about what works for you and what is safe for you vehicle.

 

[Auberon]

Interesting read.
I hope I haven't missed these points I make below, as already made.
Didn't see an answer to the filter always question.
Oil filter + oil > Yes always.

We have stuff called "bulldust" it is loaded with microfine silicates and it goes everywhere. It is abrasive as all get out its structure is appallingingly angular. If you drive through it you must reconsider any change schedule even with the best oils and filter quality you can buy.
and
For the 20000? mile truck oil changes that is a totally different ballgame. Fairly constantly loaded motor running mostly at optimum temperature conditions = long engine life with the right fluids and filters in:
and
Coolants like the red ones containing OAT's have an incredible ability to wick along any fault line in a seal/hose reinforcing fibres etc and get where they shouldn't be. They have a much greater sludging capacity than plain Ethylene Glycol based coolants.

My personal choice is to use the number in miles and use that in km's for frequency and always adjust according to conditions-never above recommended always downwards.

A bit off topic but knidof relates:
For one of our vehicles: Normally apsirated, EFI:
Am now changing air filters when I do the oil + oil filter changes as our air -especially city and running near our largest airport for much of it despite running at ideal temps after warmup they get so dirty. Surprising amounts of avgas in the air.
The atmosphere being drawn in is oily from other vehicle exhausts + avgas making the intake side of the element sticky and the microscopic particulates adhere to the filter so strongly you definitely notice a change in fuel consumption. Runs considerably richer by the end of the change cycle.
So:
Changing the air filter at the oil change frequency reduces fuel use way more than enough to pay for a filter @ our fuel prices.
Aah conditons.
Cheers
Auberon

 

[LibertyFever]

You've made a good point Auberon about changing the air filter at the same time as the oil & filter. I'm guilty of overlooking the air filter, I seldom check it unless I suspect that I've swallowed some water into the intake.

 

[Clyde Frog]

There's no blanket OCI for every engine on the planet. If there was, there wouldn't be a zillion oil filter, oil, and engine companies all across the planet.

I personally feel that I'd rather spend $25 every 3k and change my oil/filter because that's what I was taught and have yet to see any adverse effects from doing so. On the same token, I haven't seen anything using this method that would make me say it is the best and what everyone should do. It all depends what you drive and where/how you drive it.