Fuel, Oil, Cleaners & Other Maintenance Extending the life of your Civic requires the proper fuel, oil, and cleaners, along with other regularly scheduled maintenance.

"Higher Milage" 5w30 or 5w20?

Old Sep 24, 2008
  #31  
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Re: "Higher Milage" 5w30 or 5w20?

I would stick to 5w20 if that’s what the factory calls for just because it’s not good to mix 2 different types of oils together and the high mileage oil is a scam. It’s just another way for people to make money off of the same oil. The Honda dealer recommends going to fully synthetic after reaching 75K miles but who cares. Just stick to the oil that’s in it. The dealer recommends what ever oil the engine is designed to have. I run full synthetic mobil 1 in mine. Originally wasn't going full synthetic since it's take a synthetic blend but jiffy lube screwed that up. if you go full synthetic shouldn't go back down to conventional, just stay running full synthetic.
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Old Sep 24, 2008
  #32  
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Re: "Higher Milage" 5w30 or 5w20?

im a retard for posting on a post 3 years ago
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Old Sep 24, 2008
  #33  
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Re: "Higher Milage" 5w30 or 5w20?

um yeah actually valvoline maxlife works quite well and is not a scam. i would never use a full synthetic, either.
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Old Sep 24, 2008
  #34  
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Re: "Higher Milage" 5w30 or 5w20?

MOst 5-20 oils i came across are already synthetic blends, all major car companies are using it now, ford, hyundai, mopar, gm, honda... are going with 5-20, i've seen many 100k+ fords using 5w-20 with no problems and no leaks, i'd say stick with 5w-20 its what the engineers came up with when they built the motor so leave it to them and keep with 5w-20. To make it clear most top brand oil names that make 5-20 weight are synthetic blend, so i wouldn't switch over to a non synthetic 5w-30.
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Old Sep 24, 2008
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Re: "Higher Milage" 5w30 or 5w20?

5-20, your motor needs it. Any 4 cyl. import motor needs it. It all has to do with when the motor gets up to temp. or starts cold. The lower the first number the easier the oil starts to flow in the cold, the second number is basically how much slower it moves at high temp (the higher the slower it moves). These motors were made for the 5-20. I'm not saying it won't work but a good bit of 'juice' will be sucked out if you run heaiver oil (turbo set-ups excluded).
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Old Sep 24, 2008
  #36  
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Re: "Higher Milage" 5w30 or 5w20?

swett it says you live in Jamaica are you sure ur not gettin watered down gas? Idk the regulations there.
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Old Sep 24, 2008
  #37  
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Re: "Higher Milage" 5w30 or 5w20?

possibly, idk what the hell is goin on. but a fren of mine as a four door lx same 06 and he's getting great miles on the gas. he gets over 380 miles on a tank. i got 189 then my gas light came on
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Old Sep 25, 2008
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Re: "Higher Milage" 5w30 or 5w20?

well try gettin gas from another station. There is a philips66 by my house that has shitty gas i only get 200 miles a tank on their ****.
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Old Sep 25, 2008
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Re: "Higher Milage" 5w30 or 5w20?

Originally Posted by gearbox
um yeah actually valvoline maxlife works quite well and is not a scam. i would never use a full synthetic, either.
i dont think you realized how old this thread was gear...hahahha
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Old Sep 26, 2008
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Re: "Higher Milage" 5w30 or 5w20?

oh yes i did. i just wanted to repeat my first post again to make the point.
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Old Sep 26, 2008
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Re: "Higher Milage" 5w30 or 5w20?

Originally Posted by swett2k6
possibly, idk what the hell is goin on. but a fren of mine as a four door lx same 06 and he's getting great miles on the gas. he gets over 380 miles on a tank. i got 189 then my gas light came on
Any leaks in your system?
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Old Sep 26, 2008
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Re: "Higher Milage" 5w30 or 5w20?

i did a diagnostic test last week sat. they say everything is working perfect. if it continues i'm jus gonna sell it
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Old Sep 30, 2008
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Re: "Higher Milage" 5w30 or 5w20?

The 5w20 and 5w30 has been beat to death. If you run 5w30 in your car because you think 5w20 is too thin. Keep this in mind that most 5w30 will shear down to a 20w anyways after awhile. Run whatever is on sale. The only reason why Honda use 5w20 is to get that .01 mpg increase (CAFE). Other part of the world will specify a much thicker oil in the same engine.

If you think i'm making this stuff up, ask the oil expert at bobistheoilguy.com
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Old Sep 30, 2008
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Re: "Higher Milage" 5w30 or 5w20?

yup very true, finally someone else knows lol. i didnt think about the shearing but that makes sense too
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Old Oct 1, 2008
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Re: "Higher Milage" 5w30 or 5w20?

well i fill up last friday. now i have 3 bars lef which is less than 1/4 tank and i only gone 155 miles. i'm gonna sell this piece a sh++. i'm getting to dislike this car. my pops lexus burns gas better than my car.
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Old Oct 6, 2008
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Re: "Higher Milage" 5w30 or 5w20?

Run it till it stops movin might be a gauge problem
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Old Oct 6, 2008
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Re: "Higher Milage" 5w30 or 5w20?

Originally Posted by Silver02EX
Keep this in mind that most 5w30 will shear down to a 20w anyways after awhile.
what does that mean, "shear" down the engine? wt happens to the oil? it turns into 20w? im confused...hahah
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Old Oct 6, 2008
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Re: "Higher Milage" 5w30 or 5w20?

pretty sure hes talking about oil lol. and yeah it will break down to a thinner weight over time. remember when you do oil change, it always comes out thinner than what you pour in
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Old Oct 11, 2008
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Re: "Higher Milage" 5w30 or 5w20?

Originally Posted by gearbox
pretty sure hes talking about oil lol. and yeah it will break down to a thinner weight over time. remember when you do oil change, it always comes out thinner than what you pour in

Yeah that's what i mean. Most 5w30 will shear down to a 20w over time.

I've used everything from 5w20 or 5w30 10w30, conventional, semi syn, and full syn. I can't tell the difference from one oil to another while it's in my car. Find the cheapest 5w20/30 and use it.
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