Mixing oils

Post by **chrisd87** » Fri Oct 27, 2006 4:44 pm

Quick question - is it OK to top up a car filled with 20W/50 oil with 15W/40?

Post by **nebogipfel** » Fri Oct 27, 2006 4:50 pm

chrisd87 wrote:Quick question - is it OK to top up a car filled with 20W/50 oil with 15W/40?

Yes,

I'd stick with good old 20W/50 in a Moggie

Duckhams takes some beating

wait for it.......................

Post by **bigginger** » Fri Oct 27, 2006 7:04 pm

Wait for what?

Post by **Welung666** » Fri Oct 27, 2006 7:22 pm

I'm still waiting

Post by **bigginger** » Fri Oct 27, 2006 7:30 pm

Me too

Post by **bmcecosse** » Fri Oct 27, 2006 8:02 pm

Me ??? Sorry to keep you waiting! Stick with 20W50 in summer, but in winter 15W40 probably ok.

Post by **Welung666** » Fri Oct 27, 2006 8:18 pm

It's OK Roy.... I got all night

Post by **nebogipfel** » Fri Oct 27, 2006 9:09 pm

Ok, I was wrong

I expected to be told that modern oils are vastly superior etc etc

I guess I underestimated the discerning folk on this forum

Post by **bigginger** » Fri Oct 27, 2006 9:21 pm

Aha - it certainly never occurred to me to say that...

Post by **chrisd87** » Fri Oct 27, 2006 10:00 pm

Thanks for the replies. I topped it up with 15W/40 the other day as it's all I can find locally and was a bit worried it might not mix properly with the other oil.

Post by **Peetee** » Sat Oct 28, 2006 6:29 am

it's all I can find locally

Have you tried Tesco's?
Normally I wouldn't recommend you buy car service items from anything other that your local parts supplier but Tesco's do have 20/50 and the big one's are open all day.

Post by **8009STEVE** » Sat Oct 28, 2006 8:44 am

I have just got a gallon of oil from Morrisons. It was £4.95. Idont have to worry too much what viscosity it is as it isnt in the engine long enough.

Post by **bmcecosse** » Sat Oct 28, 2006 1:48 pm

Sadly ASDA have recently put the price of their oil up - so I can't recommend that one any more!

Post by **minor_hickup** » Sat Oct 28, 2006 4:11 pm

Lidl's also sell cheap 15w40 which meets ACEA A3/B3 standards. I've been using it in our mower that uses as much oil as my minor. I may try it in the minor if things get really cold.

Post by **chrisd87** » Sat Oct 28, 2006 6:45 pm

Have you tried Tesco's?

Hadn't thought of that - I looked in Sainsbury's petrol station yesterday and they only had Castrol GTX 15W/40.

Post by **Kevin** » Mon Oct 30, 2006 1:55 pm

I expected to be told that modern oils are vastly superior etc etc

They are but they are just to thin for the moggie engine and will increase the leak capacity of the engine.

Both Asda and Tesco sell it in store but it may not be on their forecourts, and I think Wilkinsons also do one. Another old favorite that is often kept in the smaller motor factors is Comma Oil.

Post by **minor_hickup** » Mon Oct 30, 2006 2:34 pm

Kevin, is the comma oil you mention called 'motorway 20w50'? If so I've never bought it because there were no ratings on the label. I havent been able to find oil in either of the tesco stores near me

Post by **Kevin** » Mon Oct 30, 2006 2:57 pm

Well its a long time since I have been in my local Tesco`s superstore (its manic where I live) and ~I have not used the garage for a while.
The Comma oil is premium 20w50 and is rated API SE and is sold by Bull Motif, the Motorway one you mention I cant read the label on their website so I dont know.
http://www.commaoil.com/

Post by **minor_hickup** » Mon Oct 30, 2006 10:07 pm

Thanks for the link Kevin. The 'sonic' 20w50 achieves API SJ, which I've never seen on a 20w50.

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Mixing oils

Mixing oils

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