which is it 2967.2 km or as CAN-view say's only

[Frank Hudon]

68% of that number for the oil change interval.
Trip Km's total was 2967.2 km's for the trip took 37 hours 13 minutes and the average Km's per hour was 79 kmh. but the ICE only ran for 68% of those km's so the guestion is 2967 or 2017 Km's on the oil?

[David Beale]

<div class='quotetop'>QUOTE(Frank Hudon @ Sep 3 2006, 05:04 PM) [snapback]313652[/snapback]</div>

68% of that number for the oil change interval.
Trip Km's total was 2967.2 km's for the trip took 37 hours 13 minutes and the average Km's per hour was 79 kmh. but the ICE only ran for 68% of those km's so the guestion is 2967 or 2017 Km's on the oil?
[/b]

You're using CANview, correct? If so, the kms on the engine is only when fuel was being injected. The engine could have spun a lot more. I'd go with the higher number. CANview doesn't tell you % time it was spinning (yet). After reading through the topic on CANview (whew, that was a lot of reading!), I'm sure it could desplay just about anything soon.

[efusco]

I'll tell you that once I hit the 'magical' 60k mile mark on my car I'm going to start cutting back oil changes to every 10k miles. I'm currently 'behaving myself' just in case there's some problem with the ICE so that I know it will be covered by warranty and Toyota won't be able to say it's my fault.

But I think there is more than sufficient data to support that with today's oils and engines every 10k miles is very safe even on a conventional ICE that runs every mile of driving. With my car, who's ICE runs <50% of the time that I'm actually driving the car, I certainly think 5k miles is overkill and wasteful. Heck, 10k might be overkill and wasteful.

It seems to make sense, in this era of hybrids, to switch to a Hobb's type timer for determining when to change oil. For instance, the Hobbs would only time when the ICE was running and every 100 hours or so you'd go get the oil changed. Seems quite an easy thing to implement.

<div class='quotetop'>QUOTE(David Beale @ Sep 3 2006, 06:09 PM) [snapback]313655[/snapback]</div>

You're using CANview, correct? If so, the kms on the engine is only when fuel was being injected. The engine could have spun a lot more. I'd go with the higher number. CANview doesn't tell you % time it was spinning (yet). After reading through the topic on CANview (whew, that was a lot of reading!), I'm sure it could desplay just about anything soon. [/b]

Actually, I thought he was using the ICE rpm to determine ICE-on time...anything over 950rpm is considered 'running'.

[Frank Hudon]

<div class='quotetop'>QUOTE(David Beale @ Sep 3 2006, 04:09 PM) [snapback]313655[/snapback]</div>

You're using CANview, correct? If so, the kms on the engine is only when fuel was being injected. The engine could have spun a lot more. I'd go with the higher number. CANview doesn't tell you % time it was spinning (yet). After reading through the topic on CANview (whew, that was a lot of reading!), I'm sure it could desplay just about anything soon.
[/b]

granted is could have been spinning but with out any byproducts of combustion or the heat it becomes no different than an air compressor which most have a 1-2 year oil change interval.

[Tideland Prius]

Again, why doesn't Toyota implement an oil sensor to determine the life of the oil and thus give us a real MAINT REQ'D light. If Acura and GM can have it, why not the Prius?

[Frank Hudon]

<div class='quotetop'>QUOTE(efusco @ Sep 3 2006, 04:11 PM) [snapback]313656[/snapback]</div>

I'll tell you that once I hit the 'magical' 60k mile mark on my car I'm going to start cutting back oil changes to every 10k miles. I'm currently 'behaving myself' just in case there's some problem with the ICE so that I know it will be covered by warranty and Toyota won't be able to say it's my fault.

But I think there is more than sufficient data to support that with today's oils and engines every 10k miles is very safe even on a conventional ICE that runs every mile of driving. With my car, who's ICE runs <50% of the time that I'm actually driving the car, I certainly think 5k miles is overkill and wasteful. Heck, 10k might be overkill and wasteful.

It seems to make sense, in this era of hybrids, to switch to a Hobb's type timer for determining when to change oil. For instance, the Hobbs would only time when the ICE was running and every 100 hours or so you'd go get the oil changed. Seems quite an easy thing to implement.
Actually, I thought he was using the ICE rpm to determine ICE-on time...anything over 950rpm is considered 'running'.
[/b]

I believe he's using the injector on/off to say it's running or not. But I have to agree with Tideland at this point in time.

[efusco]

<div class='quotetop'>QUOTE(Tideland Prius @ Sep 3 2006, 06:47 PM) [snapback]313670[/snapback]</div>

Again, why doesn't Toyota implement an oil sensor to determine the life of the oil and thus give us a real MAINT REQ'D light. If Acura and GM can have it, why not the Prius? [/b]

Do they work that well as to be reliable for all the critical oil elements? Seems like an ideal solution if they work.

[Orf]

It is common practice in Australia to state the number of km when an oil change is due or a 6 month time interval, which ever comes first. Does oil have a time life once it is in an engine, or are we being conned?

[Frank Hudon]

<div class='quotetop'>QUOTE(Orf @ Sep 3 2006, 07:42 PM) [snapback]313773[/snapback]</div>

It is common practice in Australia to state the number of km when an oil change is due or a 6 month time interval, which ever comes first. Does oil have a time life once it is in an engine, or are we being conned?
[/b]

only a UOA will tell you the truth.

[daniel]

<div class='quotetop'>QUOTE(Frank Hudon @ Sep 3 2006, 04:04 PM) [snapback]313652[/snapback]</div>

68% of that number for the oil change interval.
Trip Km's total was 2967.2 km's for the trip took 37 hours 13 minutes and the average Km's per hour was 79 kmh. but the ICE only ran for 68% of those km's so the guestion is 2967 or 2017 Km's on the oil?
[/b]

Most drivers have no way of knowing how much time the engine is running, so Toyota must give recommended oil-change intervals based on total miles (or kilometers) driven.

Whether the recommended intervals are too frequent or not is another issue, but clearly, Toyota's recommendation cannot be based on actual miles for which the engine is running. Doubtless, they make assumptions regarding the percentage of time the engine is running, ambient and operating temperatures, how much dirt is sucked in, etc.

During the warranty period, failing to follow their recommendation can void the warranty. After that, I'd still assume they are recommending based on total miles/kms driven, and make adjustments up or down based on your operating conditions.