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What about in warm temperature climates?
Not sure, But Honda in the UK recommended to me 0W-20 as it helps the Yype R engine rev quicker.
Having said that, the the handbook it does give you what oil for temperature ranges.
 
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Hho would have thought it would have been so difficult?:surprise:
Well, you'd like to think that but apparently Crisp and Dry is not good lol
 
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I have not seen that actually suggested in any Honda manual.:grin2: But I have heard that it is quite good in the fuel tank of an oil burner.>:) (for Jeez sake, don't try this at home)
 

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Reading over this...

My recently bought 2007 fn2 had one owner from new, serviced at same honda dealer every year from new until i got it in august this year

Looking through all the service invoices, for some reason honda were putting 10w40 in for first couple years from new, then 5w30 a few times,

And for the last 2yrs 2018 / 2019 theyve put 0w20 in it, always been castrol too

Cars done 95k, not. Burnt any oil at all so far in the 3mths ive owned it for

Baffled to why they been putting different grades in though.....
 

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I think recently(in the last few of years) Honda received new recommendations for oil application and they tend to put 0w20 everywhere now, because of fuel economy, environment etc. General consensus for fn2 is 5w30/5w40 grade.
 

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Was going to post a thread about this but saw this one and thought I'd add to it.

Took my FN2 to local Honda main dealer today. Slightly alarmed that Castrol Professional 0w-20 had been used rather than the usual 5w-30 but tech confirmed correct. Upon review even Cox now have it listed on their site here:


Car is on 85k miles so will see how consumption goes and report back for anyone interested.
 

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Good read as well.

8. 0W40 vs 5W30 vs 0W30

As you can see from these actual Engineering test values, all the 5W30 oils provide better wear protection than any of the 0W oils. But even so, any of these oils would be acceptable for normal daily driver use. However, for highly loaded High Performance applications where the best possible wear protection is desired, the obvious choice would be 5W30 Pennzoil Ultra, API SM or 5W30 Mobil 1, API SN, which are the only oils in this test that provide INCREDIBLE wear protection.
 

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From Total oil web page - In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to temperatures of 50°C, as opposed to 30°C.
5w40 and 5w30 motor oils have winter viscosity grades of five, meaning they are effective down to temperatures of -30°C, and are more viscous at very low temperatures, compared to, say, 10w40 oils.
Resultantly, 5w40 oils are likely to be used in higher-performance engines that have higher operating temperatures and loads than the norm – those driven in urban environments, that commonly sit in traffic or driven at particularly high speeds, for example.
If your vehicle is not designed to be driven in a high-performance manner, or you drive at a more considered, environmentally friendly pace, 5w30 oils are a good choice. These are commonly better for certain engine components such as oil pumps, can clean the engine better, and have longer lifespans due to having a lower temperature range........ - So 30 weight is for Ambient temps up to 30 before it reaches its drop point. I'm not sure about this in the Honda manual it says 30 and 40 weight are ok about 40 c I suppose total doesn't account for engine cooling - hence ' if your sat in traffic or slow urban driving' - then 30 w 5w 30 or 5w 40 still unsure.
 

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This should make it simpler for people to understand. for example, I use 5W/30 in my FN2 as it in the UK ... so the temp range of -35c to 30c is perfect.

In my desert car used in Saudi where we see temps pushing mid 50c s, I use 15W/40...
 

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Yes I've settled on 5w 30 also. In the UK like you say the 30 weight will flow better at operating temps in UK. Up side also maybe cleaner, less pump strain ect. Better flow same film strength. Thanks for the post 👍
 
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