Dan JP
L Plate Warrior
Joined: 15 Feb 2011
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Shreddie
Spanner Monkey
Joined: 20 Nov 2009
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 Posted: 17:44 - 12 Mar 2011  Post subject: Re: OIL SPEC |
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Ignore this post, it's bollocks!
But I'm leaving it here so the thread makes sense.
| Dan JP wrote: | My bike manufacturer (megelli) recommended i get 15/40w oil, but after abit of reading up on the web, i have found out that the 10/40w has replaced the old 15/40w as it offers better cold start flow properties that an 15w-40 oil but the same viscosity when at operating temperature. |
You've got your viscosities the wrong way round... The '10' or '15' is the viscosity when at normal operating temperature. The 'w40' is the cold start viscosity ('w' stands for winter). In other words, as they both end with 'w40', their cold start properties will be the same. At operating temperature however, the 10w40 will be thinner/less viscous. The lower the number, the less viscous the oil. As an example, gear oils can be SAE80 or 90 and are almost like syrup, very thick indeed.
| Quote: | Should i stick to looking for a good 15/40w oil, or should i get the 10/40w ? |
Well, 15w40 does seem an odd number for them to ask for as I've never heard of that particular grade for bikes. 15w50 yes, but not 15w40. The problem with a 10w40 is that the thinner viscosity at operating temperature may not offer enough protection for your engine as less viscous oils protect less well... With that in mind, I'd be more inclined to buy a 15w50 oil instead.[/b]
Last edited by Shreddie on 20:28 - 12 Mar 2011; edited 1 time in total |
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weasley
World Chat Champion
Joined: 16 Oct 2010
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Shreddie
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