Can I use 10W40 instead of 5W40

Post by **mattye** » Fri May 06, 2016 8:16 am

Hi all, my first post after joining.

The spec for the RT calls for 5W40 synthetic oil but this seems a little harder to get hold of than 10W40.
Does anyone have a view if using 10W40 would make any difference to the engine.
I know that the 5W refers to the cold temp performance of the oil but as we are coming into summer and for the miles I do it will be changed again in about oct is it going to matter.

Any views/opinions?

Post by **David.** » Fri May 06, 2016 8:33 am

mattye wrote:The spec for the RT calls for 5W40 synthetic oil but this seems a little harder to get hold of than 10W40.

Castrol 5W-40 is available from OPIE Oils, http://www.opieoils.co.uk/p-77367-castr ... e-oil.aspx,
I prefer to purchase from them, however, I use the MOTO-OIL price, http://moto-oil.co.uk/castrol-power-1-racing-4t-5w-40, with OPIE's "Price Beater" promise.

Post by **mattye** » Fri May 06, 2016 8:56 am

Thanks for the quick reply and links.

Do you recon 10W40 would make any difference as it's a bit cheaper. £33 for 4 ltr's.

Post by **David.** » Fri May 06, 2016 9:25 am

mattye wrote:Do you recon 10W40 would make any difference as it's a bit cheaper. £33 for 4 ltr's.

BMW only recommend 5W-40 for the LC RT, I'm sure 10W-40 would be fine, but I'd stick with what's recommended, especially if the bike is under any kind of Warranty.

Post by **Levisp** » Fri May 06, 2016 9:26 am

I know why your asking 5W40 is a PITA to get hold off at a sensible price. Unfortunately the riders handbook for the LC does not have the usual oil / temperature graph giving alternative grades for winter and summer. BMW for some reason only specify the one grade. Why I do not know. Will it harm your engine using 10W I doubt it but I personally would not as my bike is still under warranty. If you want a cheaper price source your oil from Germany. Have a search on flea bay. You can buy the correct oil Castrol 5W40 for about £8 - 9 / litre.

Just found my receipt for my last lot of oil from Frinken-Racing Germany 8 litres for £62.17 including P&P. That works out at £7.77 / litre.

Best search came up with http://www.ebay.co.uk/itm/7-98-l-Castro ... Swl8NVfVpA

Works out at £7.39 / litre

Post by **mattye** » Fri May 06, 2016 10:21 am

Cheers all for your replies.

Looked on flea-bay and for the oil from Germany. I'll order that as the price is a bit more sensible. 8)

Post by **pbsrides** » Fri May 06, 2016 1:29 pm

Mine shifts better with the right oil filled to half way up the sight glass.  First oil change, dealer put in wrong oil ("we use that oil for all the bikes"). This bike is different--wet clutch. I changed it myself 3000 miles later. It shifts better with the right oil.

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Post by **T6pilot** » Fri May 06, 2016 3:50 pm

Amazon can be your friend when purchasing oil, some good deals on 5-40 castrol synthetic
Currently BMW is selling their rebranded shell 4 liters for the price of 3.

Post by **David.** » Fri May 06, 2016 4:14 pm

pbsrides wrote:First oil change, dealer put in wrong oil ("we use that oil for all the bikes").

Which Dealer (BMW or not?) & what oil did they put in.

Post by **pbsrides** » Sat May 07, 2016 3:19 am

Gulf coast bmw Houston. Advantec 15-50 at $15.23/quart. I told them what they did and that it shifted better with the proper oil. They said "oh." Just got the Castrol 5-40 delivered to my door for less than $9/quart.

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Post by **Levisp** » Sat May 07, 2016 11:25 am

Don't you guys across the pond have Shell Rotella 5W40 thats cheap.

BMW R1200RT/R1250RT Forum