Should I change or not? (EP in a corolla)

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I have been putting a bunch of miles on my 2002 corolla with the 1ZZ-FE. The engine is not the sludger engine but is know for consumption issues. Since Dec 4th I have put 6000k miles on the car which has a fill of M1 5w30 EP. I have not added any oil and the oil is down a couple mm on the dipstick but still well above the low fill line so the engine barely consumes oil. So should I let it run to 10k miles or drain it and put in some M1 0w30 AFE? I probably will not send a sample off for UOA so just looking for some opinions.
 
Why are you considering changing an oil guaranteed for 15,000 miles (I've actually heard that they have recently changed the recommendation to 20,000 miles) at 6000 miles? Most any good regular dino should be good for 6,000 miles.
 
what was the last fill? if the last fill was m1 i would go alot longer than if it were dino because it would still have some left in it after the oc
 
10K with your engine is a breeze and 15K is what I would do with the miles you are driving. A friend is doing 15K with the 5-30EP with no problems at all in his 03 Windstar.
 
20,000 miles on the same oil? There are a couple of car companies that have really long oci's
we see many of them coming in for rebuilds.. Keep up the good work and keep all 12 of us employed..
Thank you
 
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Originally Posted By: tig1
10K with your engine is a breeze and 15K is what I would do with the miles you are driving. A friend is doing 15K with the 5-30EP with no problems at all in his 03 Windstar.


Exactly, those are highway miles obviously so an easy 10k at least, maybe a bit more. If you're going to continue those crazy miles your next fill of EP would take you to 15-20k.
 
Why is it that people read all the hype about Syn oils, enough to pay double the price for advantages they really have no clue about other that the hype they read and believe all of it except that it lasts way, way longer.
 
Originally Posted By: chubbs1
I don't see why you can't buy a quart to top off until you get to 10K. $5/qt. at K-Mart right now for EP.
I do not understand why people do not buy the extra qt to add when they buy the oil change oil and filter.
 
Originally Posted By: HTSS_TR
Leave it in until 10-12k miles, no need to top off until the oil level close to the add line.


If you read the neptune site, they found pretty substantial impacts on TBN from even small amounts of top up oil. IMO, it was the most significant finding of their study. As a result, I top up if it's just 1/4 qt low.
 
Originally Posted By: teddyboy
Originally Posted By: HTSS_TR
Leave it in until 10-12k miles, no need to top off until the oil level close to the add line.


If you read the neptune site, they found pretty substantial impacts on TBN from even small amounts of top up oil. IMO, it was the most significant finding of their study. As a result, I top up if it's just 1/4 qt low.


I'm with you, unless the oil is about to come out, I go ahead and keep it always above the half-way mark. Full if possible...but I hear it's typical for a small 4-cylinder to lose oil. It's a high-rev engine and a stick shift.
 
I'm surprised all the recs are to go past 10k (maybe bill is not awake yet). With the valve stem seals issues in this engine if I would have asked 3 months ago I would have gotten the opposite advice. Funny how things ebb and flow around here. On a side note I got the EP for under $4/quart so dumping it at say 7500k does not bother me a bit.
 
Originally Posted By: lipadj46
I have been putting a bunch of miles on my 2002 corolla with the 1ZZ-FE. The engine is not the sludger engine but is know for consumption issues. Since Dec 4th I have put 6000k miles on the car which has a fill of M1 5w30 EP. I have not added any oil and the oil is down a couple mm on the dipstick but still well above the low fill line so the engine barely consumes oil. So should I let it run to 10k miles or drain it and put in some M1 0w30 AFE? I probably will not send a sample off for UOA so just looking for some opinions.



My brother has the same engine as you in his Vibe (aka Matrix). It's a 2003 with the 1ZZ-FE, 5-speed manual. His engine does have consumption issues (through the rings), but still has decent compression and runs fine. It requires regular top ups to keep it full. Also, Toyota has released a new dipstick for the vehicle, with a larger area between the L and H marks, so in essence, it adds 0.5 qts more capacity to the system. You should inquire about this and use it as your new fill guideline.

In any case, my brother has had no trouble running any good syn oil to 15k miles. He does mostly highway mileage, and combined with the regular top ups, the oil and UOA's seem to look fine. The only thing to watch with this engine over extended drain intervals is insolubles. It does tend to really load up a filter over an OCI, so always use a good extended drain filter such as Amsoil EaO or Mobil 1. I'm sure there are others that will work, but my experience lies with these.

Any kind of short trips on this engine will cause fuel dilution, and will necessitate a shorter OCI. I'm not sure that you do any short trips, but I thought I'd warn you in advance (especially in the winter).
 
Sorry, I just wanted to post a correction to my last post...

I was getting you the part number for the new dipstick (15301-22050), but when I double checked the specs, Toyota has only applied it to 2003+ model years of that body style that had build dates in 2002 or later. Obviously, this only applies to the 1ZZ-FE engine as well (NOT the 2ZZ-GE).

So I wasn't sure if yours is an '03 model built in 2002, or if it's an '02 model.
 
Originally Posted By: il_signore97
Sorry, I just wanted to post a correction to my last post...

I was getting you the part number for the new dipstick (15301-22050), but when I double checked the specs, Toyota has only applied it to 2003+ model years of that body style that had build dates in 2002 or later. Obviously, this only applies to the 1ZZ-FE engine as well (NOT the 2ZZ-GE).

So I wasn't sure if yours is an '03 model built in 2002, or if it's an '02 model.


It is a 2002 model, thanks for the info though. I usually use mobil 1 filters and run synthetic oils around 7500 miles depending on how we are driving it at the time.
 
Another vote for leaving it in. I assume you're mostly putting highway miles on there, that's easy on the oil. I wouldn't consider changing it before 10k, and even then I might let it ride a little longer.
 
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