Are 15k, 25k, 35k, OCI for real?

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See, I don't even need an OLM
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Here is a guy who did 25K with Amsoil in his still under warranty 2.5L Subaru turbo. The results were not pretty, and the thread at nasioc.com was a bit of a soap opera.
Here is how the owner started that particular thread:

"Here's the scoop:
My turbo and cam sensors failed at 44k miles. I brought it to Subaru and they immediately threatened to void my warranty on seeing my dark oil. They asked for my maintenance records to see how often I'd changed my oil. I've been using Amsoil on their recommended 25k mile oil change intervals. Subaru denied my warranty. Amsoil has asked for the damaged turbo to be shipped up along with more oil samples and the filter.

I am pursuing whatever legal avenues I have available to me. It's cost me $2800 to repair.

Can Subaru deny my warranty this way? Obviously they have, so far. If anyone has any input, I'd appreciate it."

http://forums.nasioc.com/forums/showthread.php?t=1353582
 
Originally Posted By: SubLGT
Here is a guy who did 25K with Amsoil in his still under warranty 2.5L Subaru turbo. The results were not pretty, and the thread at nasioc.com was a bit of a soap opera.
Here is how the owner started that particular thread:

"Here's the scoop:
My turbo and cam sensors failed at 44k miles. I brought it to Subaru and they immediately threatened to void my warranty on seeing my dark oil. They asked for my maintenance records to see how often I'd changed my oil. I've been using Amsoil on their recommended 25k mile oil change intervals. Subaru denied my warranty. Amsoil has asked for the damaged turbo to be shipped up along with more oil samples and the filter.

I am pursuing whatever legal avenues I have available to me. It's cost me $2800 to repair.

Can Subaru deny my warranty this way? Obviously they have, so far. If anyone has any input, I'd appreciate it."

http://forums.nasioc.com/forums/showthread.php?t=1353582


What a TOOL!! First of all - IF the Amsoil Dealer told him 25K miles (I doubt it) - he was deadassssssss wrong. 15K is the absolute max in the best conditions with a turbo. He screwed the pooch. He's out. Amsoil will not support him.

http://www.amsoil.com/lit/g1490.pdf
 
Originally Posted By: Robert1955
Originally Posted By: Gary Allan
This guy did over 25k a year?

Ummmmmmm..... I do 36,000 a year so.....



On one oci??
 
[Does anyone go that far? Should I get a bypass filter?]

I change every 5K but that's just me. The long OCI oils I wouldn't go over 10K. But again that's just me.
 
Originally Posted By: Robert1955
Originally Posted By: Gary Allan
This guy did over 25k a year?

Ummmmmmm..... I do 36,000 a year so.....



If you're doing 150 miles a day, 125 of them are at near zero insult to the oil. If I have no problem doing 13months over 9k miles with short trip usage ..... I'd have no problem doing 35k over 12 months with no short trip usage. Naturally, I'd be using UOA to determine if fuel and whatnot were okay.

The point that I was making is that this guy just said "I was doing Amsoil's 25k OCI" ...and we don't have a clue if he did it over 2 years or what.
 
I would tend to agree with the folks here that are basing their answer to the question on how fast the vehicle racks up mileage, and what type of driving is being done during those miles.

The Amsoil 25k OCI assumes normal (not severe) conditions, and basically an ideal driving environment. Also, the 25k would have to be done within a 1 year maximum time period to warrant a 25k OCI. Anything that deviates from the defined "ideality" would cause the oil to degrade at a faster rate, thus effectively reducing the maximum OCI the oil can handle.

So it really depends on the type of driving, the environment, the vehicle condition, and the amount of time over which the mileage is put on.
 
I drive around 70,000 miles a year thanks to a stupid job that is 110 miles away (220 miles+ round trip). I was brought up on the short OCI theory and have averaged 3k ocis (now doing 5k+). I honestly think that has something to do with my near perfect used oil analysis even at 100,000+ miles on the Odo. Better safe than sorry I always say. Still, I find these long OCIs really fun to read.
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Long as it isn't me risking my engine.

Think about it... a $30 oil change every few months. I spend more on gas in a 2 day period so doing a super long oci is silly in my opinion (for me in my situation).

I would only do a 10k, 15k, 25k, 30k, oci if 1. It wasn't my car. 2. It was a secondary/trash/throw away vehicle. 3. I could get used oil analysis done whenever I wanted with an oil pump.
 
In 1999 I bought a used 1995 Grand Am with 190,000 Kilometres on it. I bought the car for a very reasonable price. I later found out the previous owner (salesman who drove a lot of HWY miles)had only changed the oil 3 times since he first leased the car new. One oil change was 70,000KM over one year on conventional oil. I was at first very concerned about this, but the car ran fine and burned no oil. The engine was noisy, but all GM 2.4L 4cyl were like that. I put 30,000KM on the car and sold it two years later for more than I paid for it. Makes you wonder about the need for 5,000KM oil changes.
 
I have done 25K OCI's on my 1984 Ford with the 6.9 diesel. I started this shortly after I purchased the truck. I was driving 5 day's a week from Shadow Hills California to East LA back then.

I used the Amsoil straight 30 weight with the bypass filter. Back then it was a cartridge type bypass filter. The fullflow I used was the Fleetguard filter for the engine. I alway's got the 12or13K UOA done. The oil near the end was a 40weight, but it did go the 25K on a regular basis.

I still have that old truck and drive it now and then. In fact, the cartridge bypass filter was replaced with the spin on and now sports the Eao bypass filter.

In the vechile list you have in your beginning post. I would not hesitate to buy the 0-30 or 0-20 spec oil...put the fullflow Eao oil filter and Eaa air filter on and do the 15K OCI on any of them. Work out a plan with a dealer to use the tri-guard system and follow the system to the letter. Fully document the miles, date, used oil analysis, OCI's, etc and you will be glad you did.
 
I drive about 33k a year, 115 miles a day to/from work. I consider my commute to be at least 80% highway. My Honda has the maintenance minder (aka OLM). The vehicle is pretty new (I've had it for 9 days) and I've accumulated about 850 miles so far. The maintenance minder still says I have 100% oil life left. If oil life is linear, that would mean my system is telling me I can go at least 8,500 miles between changes. I guess we'll see but my next oil (after the factory fill)will be synthetic. My goal is a 10,000 mile OCI but before I get there I'll be doing oil analysis to make sure the engine is adequately protected.
 
Originally Posted By: DrRocket
I notice that Mobil and Amsoil advertise their products as good for very long oil change intervals (15,000 to 35,000 miles).

Yet I see no one here seems comfortable to go this far--except the son of a Porshe owner that went just under 20,000 on M1.

Does anyone go that far? Should I get a bypass filter?

2005 Prius
2005 Hylander 4 cyl
2006 Scion xB





DrRocket,

Long oil change intervals are possible but the car makers will need to engineer an oil filter that can go that far. Only BMW car have from what I've heard are once per year oil changes. For my personal cars I'd never take the chance.

Durango
 
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