Oil Change Intervals 3k vs Longer with full synthetic

[CarlB]

Depends on an engine and car

Mine is g37 has great engine vq37, won some awards. Very smooth and enjoyable to drive. But with the short trips and spiritual driving it falls into the severe driving category.

The manual says 3750 miles or 3 months which I am doing as I want to keep it as long as I can as we like that car since bought new

Plus buying another vehicle to save money is generally a fallacy. Keeping what you have is the play.

 

[jetman]

SWRI OCI Formula = sump capacity qts x 200 divided by 4 x mpg = miles.

Examples:
For my 6.2L = 6qts x 200 = 1200, divided by 4 = 300, x 15mpg = 4500 mile oci
For my 5.7L = 7qts x 200 = 1400, divided by 4 = 350, x 26mpg = 9100 mile oci
For my 12.7L = 40qts x 200 = 8000, divided by 4 = 2000 x 7.5mpg = 15,000 mile oci

I have a long history of UOA on my vehicles and this formula works good.

 

[TwoC400s]

For how long do you keep your cars? Keeping within warrenty period is one thing, beyond 150-200K is completely another

Also so many other things can affect OCI,
not much data you've provided

I traded in my 05 Audi A8 when it had 154k miles. Engine ran flawlessly, but the rest of the car was a money pit. Bad AC, terrible chassis wiring, and an unreliable air suspension. If I could have easily transplanted that power train into a fresh chassis I would have. I owned it for 11 years.

Both my current Benzes are 10 years old, consume less than a quart of oil in a 10k change, and have clean timing assemblies showing almost zero varnish. One has 150k miles, the other a bit over 70k.

 

[thetricky]

Plus buying another vehicle to save money is generally a fallacy. Keeping what you have is the play.

No, no it’s not. If you own a crap engine that requires ~3k oil changes and even then no guarantee it won’t destroy itself by ~100k, absolutely worth a swap. Sure, oil, filters, and preventative maintenance will certainly cost more, however, the reliability hit is the worse as most of us really depend on our vehicles.

 

[factorytuned2012]

I was taught the old way of changing oil and filter every 3k miles as regular routine maintenance and i know oil has changed a lot over the years
Even though i run Mobil 1 Full synthetic in all my cars now i still have a hard time going over the 3k miles without doing an oil change
I would never consider going 7500 10000 miles ever and i know some people say that's fine to do but I'm not willing to take the risk
What are thoughts about 5K mile oil change intervals I run full synthetic Mobil 1 in the engines and usually run stock filters
Mopar in dodge, Mobis in hyundai, and i use napagold/wix in the wifes honda
My hyundai i will stick to 3k simply because its gdi and i spray intake valve cleaner into the engine every oil change to try to minimize carbon buildup on the valves. I also have a 20 year old pontiac that ill stick with 3k simply due to it being an older car now. is it worth sticking to 3k oil changes just to maximize engine protection?

With Mobil 1 full synthetic all your vehicles can do 5k oci’s

 

[ChrisD46]

OCI of 5K mile / 6 month / 150 hours on oil (which ever comes 1st) would serve a lot of users well .

 

[ChrisD46]

It’s even stranger to see on this site though. One would think if someone is obsessive enough to be on a site dedicated to lubricants then they would avoid questionable engine models!

When I bought my 2017 Hyundai Sonota 2.4L GDI engine - I knew about the previous model years Theta II engines issues - but research indicated Hyundai had resolved their Theta II engine issues by 2017 … Well that turned out to NOT be true ! I went with the best info available before buying and still got burned - so you never know .

 

[wemay]

No matter what i drive, 3-4k mi max.

 

[CarlB]

No, no it’s not. If you own a crap engine that requires ~3k oil changes and even then no guarantee it won’t destroy itself by ~100k, absolutely worth a swap. Sure, oil, filters, and preventative maintenance will certainly cost more, however, the reliability hit is the worse as most of us really depend on our vehicles.

Show me the money.

 

[CarlB]

No matter what i drive, 3-4k mi max.

You should swap to something else to save money. (Sarcasm)

 

[thetricky]

Show me the money.

If it’s a vehicle that takes you to and from work and other important places, why risk it? If it’s a hobby car then great, have fun.

 

[thetricky]

When I bought my 2017 Hyundai Sonota 2.4L GDI engine - I knew about the previous model years Theta II engines issues - but research indicated Hyundai had resolved their Theta II engine issues by 2017 … Well that turned out to NOT be true ! I went with the best info available before buying and still got burned - so you never

I get it, you did the research though. Many don’t, and are just pulled in by the bells and whistles.

 

[CarlB]

If it’s a vehicle that takes you to and from work and other important places, why risk it? If it’s a hobby car then great, have fun.

I'm asking you to show me the financials. Say I own one of the aforementioned Kia/Hyundai products. How much more is it going to cost me to replace it with something perceived to have better reliability? At what point does the decreased maintenance break-even on this more reliable replacement?

 

[tired]

Plus buying another vehicle to save money is generally a fallacy. Keeping what you have is the play.

I'm asking you to show me the financials. Say I own one of the aforementioned Kia/Hyundai products. How much more is it going to cost me to replace it with something perceived to have better reliability? At what point does the decreased maintenance break-even on this more reliable replacement?

Exactly. I think this is a little known and understood fact. Just factoring in depreciation and increased insurance cost, it would be difficult to find a scenario where the newer car is cheaper.

 

[Strumpan_]

I do 6200miles because it is 10000km which is easy to keep track of in every car i own. Never had any issues. Doing 3000miles for me would be a oil change almost every month or two. Way too often. Oil here is 60-100 bucks for 5L

 

[Patman]

My engine selection wouldn't be based on ability for extended OCI.

It’s more about the fact that those engines seem to die at the drop of a hat if you go one mile beyond 3000 on the oil I would never want an engine that is on the edge like that

 

[Faawrenchbndr]

I traded in my 05 Audi A8 when it had 154k miles. Engine ran flawlessly, but the rest of the car was a money pit. Bad AC, terrible chassis wiring, and an unreliable air suspension. If I could have easily transplanted that power train into a fresh chassis I would have. I owned it for 11 years.

Both my current Benzes are 10 years old, consume less than a quart of oil in a 10k change, and have clean timing assemblies showing almost zero varnish. One has 150k miles, the other a bit over 70k.

Audi is a wonderful car however, yeah, maintenance and upkeep is not cheap

 

[maduroman]

I was taught the old way of changing oil and filter every 3k miles as regular routine maintenance and i know oil has changed a lot over the years
Even though i run Mobil 1 Full synthetic in all my cars now i still have a hard time going over the 3k miles without doing an oil change
I would never consider going 7500 10000 miles ever and i know some people say that's fine to do but I'm not willing to take the risk
What are thoughts about 5K mile oil change intervals I run full synthetic Mobil 1 in the engines and usually run stock filters
Mopar in dodge, Mobis in hyundai, and i use napagold/wix in the wifes honda
My hyundai i will stick to 3k simply because its gdi and i spray intake valve cleaner into the engine every oil change to try to minimize carbon buildup on the valves. I also have a 20 year old pontiac that ill stick with 3k simply due to it being an older car now. is it worth sticking to 3k oil changes just to maximize engine protection?

5k is fine , .longer than that ..nope
Shorter than that ? Waste of money

 

[tblt44]

I go 5 -7k

 

[Auto tech]

When manufacturers recommend maintenance intervals we must remember the following: the manufacturer doesn't want you to keep the car ten plus years. There job after all is to sell you a new one. The manufacturer also makes it seem like the cost of ownership and maintenance will be less money by recommending longer intervals. This makes the buyer think " "wow this car won't cost me much to operate ". Plus they get government credit for providing environmentally friendly vehicles. Less oil changes, trans services and other services equals less waste fluids and less pollution. Just because they may recommend certain intervals does not mean it's what's best for the vehicles