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04-11-2007, 06:21 PM | #109 | |
Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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Quote:
1) The Prius' ECU runs the engine in an Atkins cycle which involves a longer spark at a lower temperature (for ionization) and requires less fuel as it burns more thoroughly but at a lower RPM/torque level. The Yaris' ECU runs the engine in a typical Otto configuration which involves a short and hot spark at the top of the compression stroke. This means the Yaris' engine runs at higher RPM and hotter. 2) The Prius' engine is almost never in a direct wheel feed scenario. The engine feeds to the HSD and the battery (which in turn runs the electric motor), and the HSD plays a hardcore game of matching inputs from both the engine and motor to produce torque in the CVT. The CVT in turn plays a hardcore game of balancing torque input and output to produce movement. These systems are a far cry from the Yaris' direct feed to either a transmission (MT) or torque converter (AT) which immediately convert torque to wheel drive. The point of all of this is that the Prius' engine only receives about 1/3 the beating that the Yaris' does. As such you can get away with a lighter oil in the Prius than you can in the Yaris. As with most other things sticking to the manufacturer's recommendations is best, and Toyota says 5W-30 for the Yaris.
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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04-11-2007, 11:34 PM | #110 | |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
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what about the TSB's that were mentioned earlier? |
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04-12-2007, 12:01 AM | #111 |
Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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I'm not saying that TSB doesn't exist by any means but no one ever provided the text of it or even the reference number of it, and I can't find anything on it myself. Without it we have no idea what the reasoning was, when the option applies, if it's valid for all regions and temperature patterns, etc.
As such sticking with 5W-30 is a safe bet and covers a huge temperature range. This is important to me because between where I live and work there is a 4,500ft elevation difference. In the Winter my car can experience temperatures as low as 14F with a wind chill of -20F and in the Summer it can experience temperatures as high as 100F. Because this is a high desert just our night and day delta can be 40F+ (i.e. 49F at night and 89F during the day), and the delta between my home and work can be as much as 30F over a 40 minute commute. Besides, just switching to synthetic vs. standard oil will net you the most MPG gain. You won't see as much performance or MPG difference between different synthetics like 5W-30, 0W-20 and 5W-20. Edit: Additionally, the person that was most adamant about that TSB was also the most adamant about a 5,000 mile drain interval. This shows an utter lack of eduction concerning modern synthetics which are commonly good for 7,500 miles, with some going as far as 15,000. This makes any information on this subject from that person suspect.
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. Last edited by BailOut; 04-12-2007 at 12:34 AM. |
04-12-2007, 06:56 AM | #112 |
Clean and (dis)Functional
Drives: Yaris 2dr--Black Betty Join Date: Mar 2007
Location: Tropical Minnesota
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Don't know about the TSB on the lighter viscosity....but are you saying there is a TSB on going further than 5,000 between changes by Toyota? Because only thing I've seen on that is the 5,000.....seems to me that Toyota should be the higher authority on their car than the oil marketing team! IMO by the way....
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04-12-2007, 08:16 AM | #113 | |
der Zeck
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Quote:
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04-12-2007, 08:17 AM | #114 | |
der Zeck
Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006
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Quote:
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04-12-2007, 10:02 AM | #115 | ||
Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
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Quote:
On a lighter note, if you're that worried about Toyota's wishes then maybe you should stick with standard oil. That's what your car shipped with, after all. ;) Quote:
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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04-12-2007, 02:02 PM | #116 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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i see what Black Yaris is talking about with the 5000 mile intervals.
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05-05-2007, 04:12 PM | #117 |
return of the comeback
Drives: white '08LB..very nice,i like Join Date: Mar 2007
Location: sacramento,CA
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The tuning shops in sac sell em bro! --octane motorsports in citrus heights, whiplash performance along Madison Ave., and we got comptech..but they're in el dorado tho. u might wanna do a quick search! i used to buy redline oil at Trick Racing in Rancho Cordova when i had my prelude, but that was 4yrs ago, dunno if they're still there.
___ i've been using mobil 1 ep 5-30 eversince 3000. kaotic, u know i drive a lot. it's good stuff if ur driving as much as me.. i just don't wanna stress out on changing oil every month. saves me downtime and money, plus the reliability of of a good synthetic is there.. i'm switching to redline or amsoil on my next oil change.. but since u don't drive as much.. u can just stick to full syn. |
05-05-2007, 09:23 PM | #118 |
Drives: 07 Bayou Blue Liftback Join Date: Apr 2007
Location: Virginia
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http://neptune.spacebears.com/cars/s.../oil-life.html
My family used Amsoil in heavy equipment for years with high quality filters like Wix. Our equipment received regular oil analysis as this heavy metal was more then quarter of a million at a pop. Having said that I really like Amsoil!!! Just because it is black does not mean that it is not working better then brand new dino butter. |
05-06-2007, 12:27 AM | #119 | |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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Quote:
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05-06-2007, 02:09 AM | #120 |
return of the comeback
Drives: white '08LB..very nice,i like Join Date: Mar 2007
Location: sacramento,CA
Posts: 155
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05-06-2007, 05:23 PM | #121 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
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cool, i work Saturday mornings, Sunday evening, and Monday evenings.
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09-20-2007, 11:12 AM | #122 |
I am new around here. I just bought my Yaris about three weeks ago. I am an automotive lubrication specialist. I have always run full synthetic or high mileage oil in anything I own. A couple of things about your Mobile 1 synthetic oil that everyone is touting on here. Read the fine print on the back of the bottle. It very clearly states that if you fall under severe driving conditions you can't run the oil for 15,000 miles. All synthetic oils, excluding Amsoil, will tell you not to exceed the mileage in your owners manual while under warranty. If you do some research, Amsoil is the only synthetic oil out there that is preaching extended drain intervals. The purpose of a full synthetic oil isn't so you don't have to change your oil. The reason behind synthetic oils is better lubrication which reduces friction which in turn reduces heat buildup which destroys an engine over the life of the vehicle. Synthetic makes cold starts less harmful as well. Also, if you look at the Toyota issue they had with sludge or oil gelling, one of the contributing factors of the problem was extended drain intervals as well as the design of the engine. Why would you want to take a short cut when it comes to the life blood of your vehicle anyway. If you can't afford to maintain a car properly, you can't afford the car in the first place. Cars need regular oil changes, air filters and other fluid changes listed in the maintenance schedule of your owners manual. You might be amazed how long a Toyota will last IF properly maintained for the life of the vehicle. As some stated earlier, everyone has an opinion and that is just my .02 cents.
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09-20-2007, 03:40 PM | #123 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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my cousin's old Cressida lasted 400k before the engine finally gave up. as for me, i'm sticking to the 5k interval for the warranty purposes. afterwards, i think i'll change at 7,500 if conditions where i live permit me.
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