5w30

[gordon_kerr]

As per thread title is 5w30 a good enough oil for my myo2 scooby, its fully synthetic, i got a cracking deal on it , 20 litres for £50, any replies welcome.

Gordon

[paddy247]

I

[fraser_drinkwater]

Motul 300v 15/50 is the best with no argument

[Gumball]

against the grain, the 10/60 in mine WILL be absolutely fine.

so thats an option.

[gordon_kerr]

im still not sure if this will be ok to use or not, can anyone advise?

[dave_morgan]

I think it will be a bit thin to be honest, but I'm by no means an oil expert. The 2 numbers relate to the viscosity at different temperatures and generally the lower the first number the better, and the higher the second number the better.

Check what viscocity Subaru recommend and if the seconf number is higher than 30, I'd stay clear. I use Motul myself and it's 15/50 (as recommended by sti). I think castrol rs is 10/60.

If in doubt, DON'T risk it though !! Could be an expensive mistake!! I've always avoided 'cheap' oil, as I think it's a false economy to be honest.

All IMHO of course !

Dave

[gordon_kerr]

Thanks Dave

[craigdmcd]

Sorry to contradict most opinions here, and I used to believe the same as most here, until I read a very long article by Oilman ( a specialist who sells on most performance forums), but one of the best to have is a something that starts with 5w or 10w as this is when the oil is cold, and relates the ability to get through the engine quicker (the 5w is better in cold weather when temps are lower), and at the other end of the scale 40w or 50w is desirable. Enough to keep the oil flowing under hot conditions, but 60w is actually to thick and causes friction in the engine, losing valuable power. I used to use Castrol RS 10w60, and swore by it (it never did me any harm), but now use 5w40 Fully synthetic, although may swap to 50 soon. Incidentally, never use 0w30 0r 0w40 as this is far too thin for start ups on scoobies.

Just my tuppence worth

Craig

[gordon_kerr]

thanks very much for that craig

[dave_morgan]

Yep, the first number relates to the cold (startup) viscosity. The higher the number here, the harder your starter motor/oil pump will have to work to circulate the oil when cold.

The second number relates to the viscosity when warmed up. You want it to be thick enough to protect your engine, but not so thick as to create extra friction. I'd agree with Craig that you need at least 40 here, ideally 50, although I don't know if 60 is too high - that's down to personal preference I guess. If you're engine runs hot (lots of mods), you'd probably be better with a higher number here I imagine.

The two numbers don't mean much on their own, they need to be taken into the context of the temperature the relate to. A '5' viscosity oil at high temperature would be like water, while a cold '60' viscosity oil would be like tar. With the wonders of multigrade, we can have a good at both ends!

To answer the original question though, I think your 5/30 will be a bit thin!

[gordon_kerr]

cheers Dave.....f/s 5w30 oil

[martin_brown]

you could always put double the amount in and then you'd have 10/60