Impact on using 10w30 instead of 5w20 - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 31 Old 04-14-2009, 10:12 AM Thread Starter
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Impact on using 10w30 instead of 5w20

Does anyone know the impact of using a different oil viscosity on our cars?


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post #2 of 31 Old 04-14-2009, 10:57 AM
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After 10,000 miles, I start using 10w30. You will lose a low percentage of gas milage but in return, prolong engine life further. $0.02


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post #3 of 31 Old 04-14-2009, 11:05 AM
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Explain how it prolongs engine life? Higher oil pressure from the heavier oil will likely wear certain parts faster. If 10w30 was the right oil to use, honda would have done so. I think they have done a bit more research on what oil to use than you have. Use a good synthetic 5w20 (the weight the manufacturer of the car recommends) like castrol syntec and you will prolong the engine life without having to cross your fingers and hope that the 10w30 is better since you would be guessing at that point.

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post #4 of 31 Old 04-14-2009, 11:34 AM
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yea castrol syntec! drive hard!....... id reccomend mobil1 5w20 or 5w30, fully synthetic, extended performance.. thicker oil is good for hot climates and thinner oil for cold climates... thinner oil will give you a little better gas mil than a thicker viscosity but not much of a real difference..

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post #5 of 31 Old 04-14-2009, 11:34 AM
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a higher viscosity is meant for drivers who drive in extreme heat weather (desert climates). If the oil becomes TOO watery, it won't provide the right lubrication, but if it's too thick, it will require more effort from the pump system. many people in TX use 10W30 during the summer because of how hot it can be. Most places can run 5W20 with no problems whatsoever.


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post #6 of 31 Old 04-14-2009, 11:38 AM
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I would stick with 5w-20. Almost all Hondas recommended that except the Civic Si and the S2000 and thats because those engines are tuned significantly different. I debated changing my oil to a 10W-30 because I live out here in Phoenix and its gets really hot. I talked with the mechanics at the dealership I worked at and the truth is Honda knows what their engines should run, and would recommend you use anything else. I'm running Royal Purple 5w-20 Synthetic its made big difference, but I might switch to Mobile 1 because of the price. Go to a good synthetic right before 10k miles and you'll be good, you just don't wanna wait too long before going to synthetic.

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post #7 of 31 Old 04-14-2009, 11:44 AM
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Some motors (my old mitsu) have really small ports in the motors and must have a thinner oil ran in them, or it won't flow like it's designed to. This may be the case with Honda motors also, but I'm not really sure. Anyone?

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post #8 of 31 Old 04-14-2009, 11:44 AM
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5W-20 offers an increase in fuel economy and to this point have shown to be pretty good oils, plus they offer better low temperature performance.

5W-30 offers good cold weather performance and good high temperature protection to an extent but have not shown to be notably better than 5W-20 oils in applications where 5W-20 is reccomended.

10W-30 offers the best high temperature performance.


Question: What are the negative aspects of using a 5w20 oil?
Answer: 5w20 oil has less film and shear strength than a 5w30, 10w30 or a 0w30 motor oil. This can lead to increased engine wear under today's demanding heat and high-stress engine performance conditions.

Question: Don't I have to use a 5w20 oil to maintain my factory warranty if my manual recommends a 5w20 oil?
Answer: Absolutely not. Vehicle manufacturers recommend using motor oils meeting certain viscosity grades and American Petroleum Institute service requirements. Whether the motor oil is a 5w20, 5w30, 10w30 or 0w30 or even a synthetic vs. a petroleum-based oil will not affect warranty coverage. The manufacturer is required to cover all equipment failures it would normally cover as long as the oil meets API service requirements and specifications and was not the cause of the failure.

Bottom line, thicker = less engine wear, particularly in summer California where temperature in my area could reach up to +100F for weeks. This is why I always use 10w30 for summer and 5w30 for winter.

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post #9 of 31 Old 04-14-2009, 11:46 AM
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Um.... If the car was designed to use 5w-20, why do you want to put something else in it?

Unless you are an expert Honda engineer?

If so, can you come over and fix my Pressure Washer?


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post #10 of 31 Old 04-14-2009, 01:52 PM
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I agree with Lionspeed. All this falls under the cafe regulations. Very interesting reading.

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post #11 of 31 Old 04-14-2009, 02:02 PM Thread Starter
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Quote:
Originally Posted by LionSpeed View Post
5W-20 offers an increase in fuel economy and to this point have shown to be pretty good oils, plus they offer better low temperature performance.

5W-30 offers good cold weather performance and good high temperature protection to an extent but have not shown to be notably better than 5W-20 oils in applications where 5W-20 is reccomended.

10W-30 offers the best high temperature performance.


Question: What are the negative aspects of using a 5w20 oil?
Answer: 5w20 oil has less film and shear strength than a 5w30, 10w30 or a 0w30 motor oil. This can lead to increased engine wear under today's demanding heat and high-stress engine performance conditions.

Question: Don't I have to use a 5w20 oil to maintain my factory warranty if my manual recommends a 5w20 oil?
Answer: Absolutely not. Vehicle manufacturers recommend using motor oils meeting certain viscosity grades and American Petroleum Institute service requirements. Whether the motor oil is a 5w20, 5w30, 10w30 or 0w30 or even a synthetic vs. a petroleum-based oil will not affect warranty coverage. The manufacturer is required to cover all equipment failures it would normally cover as long as the oil meets API service requirements and specifications and was not the cause of the failure.

Bottom line, thicker = less engine wear, particularly in summer California where temperature in my area could reach up to +100F for weeks. This is why I always use 10w30 for summer and 5w30 for winter.
excellent write up, thanks!

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post #12 of 31 Old 04-14-2009, 03:22 PM
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I use M1 5/30 year round in TX (mild winters and hot summers).

Glad to see many smart folks who know Honda recommends 5/20 to raise its CAFE rating (minimal, really) and keep the EPA happy rather than becuase it's better for the engine. But to each his own. Good day gang.
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post #13 of 31 Old 04-14-2009, 06:32 PM
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Quote:
Originally Posted by Dreamacre View Post
Um.... If the car was designed to use 5w-20, why do you want to put something else in it?

Unless you are an expert Honda engineer?

If so, can you come over and fix my Pressure Washer?

The engine isn't designed around a specific grade of oil. The grade's of oil will work better in different environments. You wouldn't run the same oil in Alaska that you would in Texas.

Lionspeed has the right info, and the most straight-forward answer.


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post #14 of 31 Old 04-14-2009, 06:45 PM
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Alright, after reading everything: Doesn't a thicker oil produce more oil pressure, thereby wearing out seals/gaskets faster?

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post #15 of 31 Old 04-14-2009, 06:49 PM
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another oil thread

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