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| This is a discussion on oil type and fuel economy within the Gen II Prius Fuel Economy forums, part of the Gen II (2004-2009) Toyota Prius Forums category; I am a new Prius owner (may 08) and just performed first oil change myself (3.3 liters Pennzoil standard grade ... |
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oil type and fuel economy
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09-02-2008, 04:00 PM
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 #1 |
| Junior Member Join Date: May 2008 Location: Denver, CO
Posts: 2
My Car: 2008 Prius Model: Package: #2 Thanks: 0
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Friends: 0 |  oil type and fuel economy I am a new Prius owner (may 08) and just performed first oil change myself (3.3 liters Pennzoil standard grade 5/30). I notice a significant drop in fuel economy - about 10% - from low 50s to mid 40s. Is it reasonable to think this is just because of the oil? Other variables: temp, city vs highway, tire pressure, type of fuel - are the same as far as I'm aware. I am not sure what a new Prius has in it for oil. I did not put synthetic in because I plan to change the oil every 5K and it is twice as expensive. Any thoughts welcome... |
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09-02-2008, 08:47 PM
| #2 |
| Senior Member  Join Date: Mar 2008 Location: kentucky
Posts: 260
My Car: 2008 Prius Model: Package: #2 Thanks: 0
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Friends: 0 | Re: oil type and fuel economy Check the oil level.. DO NOT OVERFILL..If you overfill it will hurt your MPG's |
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| The Following User Says Thank You to sandman For This Useful Post: | ETP (07-02-2009) |
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09-02-2008, 08:53 PM
| #3 |
| Senior Member  Join Date: Jun 2007 Location: Tampa Bay
Posts: 1,845
My Car: 2001 Prius Model: Package: N/A Thanks: 4
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Friends: 2 | Re: oil type and fuel economy The short answer is that little difference is seen between oil changes by most PC members. The variation in gas pump shutoff point has usually been the biggest factor. While most of the things you said were unchanged, this one can cause a short term effect. No significant mileage differences have shown up between syn and conventional oil over quite a few threads. |
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| The Following User Says Thank You to FL_Prius_Driver For This Useful Post: | ETP (06-23-2009) |
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09-02-2008, 09:31 PM
| #4 | |
| P719 of ???  Join Date: Nov 2006 Location: South Jersey
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Friends: 2 | Re: oil type and fuel economy Quote:
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09-03-2008, 12:50 AM
| #5 |
| Senior Member  Join Date: Jul 2007 Location: Clearwater, Florida
Posts: 598
My Car: 2007 Prius Model: Package: #2 Thanks: 1
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Friends: 0 | Re: oil type and fuel economy Pennzoil dino oil...that stuff is crap...makes me shudder... Why don't you put in Mobil 1 and change every 10,000 miles. Lot less used oil. Some people go 15,000 no problem. |
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| The Following User Says Thank You to edthefox5 For This Useful Post: | ETP (06-23-2009) |
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06-22-2009, 06:30 PM
| #6 | |
| Ancient and decrepit  Join Date: Apr 2009 Location: Crestview/North Florida
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My Car: 2009 Prius Model: N/A Package: #6 Touring Thanks: 160
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Friends: 57 | Re: oil type and fuel economy Quote:
Just put in Mobil 0W30 and the car is very quiet. Checking the MPG with the AC off this week. Man it is freaking hot. Any test results on 0w30 and 0w20 and 5w30? | |
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06-22-2009, 08:00 PM
| #7 |
| Resident Conservative  Join Date: Mar 2009 Location: Austin, TX
Posts: 327
My Car: 2009 Prius Model: Package: Base Thanks: 1
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Friends: 3 | Re: oil type and fuel economy I'm at about 3500 on the odometer (had the car since March) and I'm thinking about changing to a synthetic - either Amsoil or Royal Purple. Then I'll probably keep my interval at about 5000 miles, which should work out to twice a year for me. As said, be VERY careful about the level. It's been observed that overfilling can cause issues. Better to fill with a bit less than the recommended, drive until warm, then check the oil level and bring it up as needed. |
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06-23-2009, 02:57 PM
| #8 |
| Senior Member  Join Date: May 2008
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My Car: 2004 Prius Model: Package: #9 Thanks: 0
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Friends: 2 | Re: oil type and fuel economy I use Mobil 1 0W-20 and get a 2-3 mpg boost vs. a dino 5W-30. I still change every 5000 though could probably go 7500 to 10000 safely. |
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| The Following User Says Thank You to spitinuri For This Useful Post: | ETP (06-23-2009) |
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06-23-2009, 06:29 PM
| #9 | |
| Ancient and decrepit Join Date: Apr 2009 Location: Crestview/North Florida
Posts: 373
My Car: 2009 Prius Model: N/A Package: #6 Touring Thanks: 160
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Friends: 57 | Re: oil type and fuel economy Quote:
Last edited by ETP; 07-02-2009 at 06:35 AM. | |
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| economy, fuel, type |
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LinkBack to this Thread: http://priuschat.com/forums/gen-ii-prius-fuel-economy/53026-oil-type-fuel-economy.html | ||||
| Posted By | For | Type | Date | |
| How to Change Oil on 2007 Prius on Kosmix : Reference, Videos, Images, News, Shopping and more... | This thread | Refback | 07-03-2009 09:11 AM | |
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