If an engine uses oil, can you run a longer OCI?

Status
Not open for further replies.
T

TurboTravis

Joined
Jul 26, 2007
Messages
302
Location
NY
Discuss. Example-if an engine uses a quart of oil every 3000 miles, and the sump capacity is ~3.75 quarts, can you get away with a longer OCI, considering that you're introducing a fresh quart every 3K? This is my current situation with my Corolla. I'm going to send the oil out after 15K (Mobil 1 extended performance). Will report back with the results.
 
Originally Posted By: TurboTravis
Discuss. Example-if an engine uses a quart of oil every 3000 miles, and the sump capacity is ~3.75 quarts, can you get away with a longer OCI, considering that you're introducing a fresh quart every 3K? This is my current situation with my Corolla. I'm going to send the oil out after 15K (Mobil 1 extended performance). Will report back with the results.
I would use a High Mileage type of oil, but run it for the extended OCI. You would really use up the i that way, using its full potential, with an OCI like that. Maybe M1 High Mileage? I would feel comfortable using ANY High Mileage oil, though. That is what i meant by "using it all the way up and out." Not just M1.. but thats just me. All oils mentioned are good.
 
The short answer is, yes. The long answer is, yes, but stick with your plan to send out a sample and base subsequent intervals on the results. FWIW, many with the EJ257 experience consumption, but I don't. Consequently, my goal of finding an oil I can run out to 10k miles may be nothing more than a pipe dream.
 
I would try an interval like 6k first. Then do UOA. OIl is cheap compared to an engine. Do it gradually. Really gradually.
 
Originally Posted By: TurboTravis
Discuss. Example-if an engine uses a quart of oil every 3000 miles, and the sump capacity is ~3.75 quarts, can you get away with a longer OCI, considering that you're introducing a fresh quart every 3K? This is my current situation with my Corolla. I'm going to send the oil out after 15K (Mobil 1 extended performance). Will report back with the results.
That isn't burning oil to bad, I bet a thicker viscosity oil or maybe some of that STP oil treatment would slow it down. Or do what the others said and try some high mileage oil.
 
Last edited:
I wouldn't go too long, because if something is wrong such that you're consuming, then the byproducts will go into the oil that's left. M1 HM solved my consumption issue.
 
Originally Posted By: TurboTravis
Discuss. Example-if an engine uses a quart of oil every 3000 miles, and the sump capacity is ~3.75 quarts, can you get away with a longer OCI, considering that you're introducing a fresh quart every 3K? This is my current situation with my Corolla. I'm going to send the oil out after 15K (Mobil 1 extended performance). Will report back with the results.
Have you thought about finding out why your car is using oil?
 
Originally Posted By: Bayman
Originally Posted By: TurboTravis
Discuss. Example-if an engine uses a quart of oil every 3000 miles, and the sump capacity is ~3.75 quarts, can you get away with a longer OCI, considering that you're introducing a fresh quart every 3K? This is my current situation with my Corolla. I'm going to send the oil out after 15K (Mobil 1 extended performance). Will report back with the results.
Have you thought about finding out why your car is using oil?
It uses oil because it's a 1995 Corolla with 250K on it. Considering that some auto makers consider 1qt per 1000 miles an ok amount to use on a BRAND NEW CAR, I think I'm doing ok. The engine has seen oil changes with mostly Valvoline High Mileage every 6K for the last 100K miles.
 
I suppose you could run it farther but at only 3K mi per qt(which is nothing), I'd add the qt at 3K mi and change it at 6K or whenever it was low again... You could have a UOA performed before the 6K mi(say 5500) to see how the oil is holding up, but for the price of the analysis you can change the oil and you know it's OK...
 
Originally Posted By: Clevy
With that kind of consumption just change the filter every 10000kms. Dont even bother changing the oil anymore.
MAYBE if it were using a qt in a K mile, but no way would I not change oil in this engine...
 
Originally Posted By: TFB1
Originally Posted By: Clevy
With that kind of consumption just change the filter every 10000kms. Dont even bother changing the oil anymore.
MAYBE if it were using a qt in a K mile, but no way would I not change oil in this engine...
Look. If it uses a quart every 3000 miles. That means over 6000 miles half the sumps capacity is new oil with additives replenished. It's fine. You guys worry too much. The motor is in the last legs of it's life. Use an extended drain interval oil and change the filter every 10000 miles. Done deal. If mobils EP line can go 10000 mile oci or amsoils SSO line will do 25000 miles use that stuff. And never change it again.
 
Originally Posted By: TurboTravis
and the sump capacity is ~3.75 quarts
Geez man ... that doesn't give you much margin for consumption. shocked2
 
Yes, but top it off every 1500 miles (0.5 Qt) with that size sump. Some large truck engine manuals actually come with a mileage scale based on fuel use and total oil (Including add oil). I would consider adding a Fumoto Valve and simply taking a sample every so often. If you change the filter every 10,000 miles you will find you are going through 3.75 Qt every 10,000 miles. You may find that with EP their is no need for drains.
 
Originally Posted By: Clevy
Originally Posted By: TFB1
[quote=Clevy]With that kind of consumption just change the filter every 10000kms. Dont even bother changing the oil anymore.
MAYBE if it were using a qt in a K mile, but no way would I not change oil in this engine...
Look. If it uses a quart every 3000 miles. That means over 6000 miles half the sumps capacity is new oil with additives replenished. It's fine. You guys worry too much. The motor is in the last legs of it's life. Use an extended drain interval oil and change the filter every 10000 miles. Done deal. If mobils EP line can go 10000 mile oci or amsoils SSO line will do 25000 miles use that stuff. And never change it again. [/quote My brothers Dodge Avenger with the 3.5 Liter, burns a quart every 400 to 1000 miles, now I told him to have the dealer fill it and have them track it to fix or replace engine, but he doesn't I guess that is his call. But I told him why would you change the oil at 6,000 miles, if you are throwing in a quart every 1000 at the minimum. That oily is refreshed by the time he hits 6,000 miles.
 
Heck my first car (75 Ford Granada) leaked/burned so much oil, that towards the end I just changed the filter. Because I was constantly topping it off.
 
If you go that long then at least use Mobil 1 HM... Excellent oil but I would keep a close eye on the level and amount oil added. Mobil 1 HM could cut down on the oil consumption...
 
Whatever you decide to do-do not use [censored] additives like STP or similar unless you are selling it or trading it. Then its up to your values.
 
Status
Not open for further replies.

Similar threads

Z
Oil selection for LPG-powered Fiat Stilo 1.6, oil consumption deep in the OCI
Replies
13
Views
1K
Zyborg
Speedy3861
Choices, does it make a difference ?
2
Replies
23
Views
3K
TomYoung
M
OLD (GREEN) Kendall GT-1 SAE 40 motor oil. Can I use it in a 2000 Camry?
Replies
14
Views
2K
userfriendly
Cygnus_
Grand Caravan w/ 3.3L V6 OCI
Replies
16
Views
2K
Mshuel
9
Best oil for a 3rd gen 4Rnr w/261k on it?
2
Replies
34
Views
2K
2013ecof150
Top