August 7, 2012, 12:09 pm
I spotted 4 litres of carlube which meets ford spec but it semi synthetic and I use fully as that's what's recommended but can you use semi for topping up .. just wondering if its ok to mix semi and fully synthetic oil ?
it was £7.50! down from £10 at my local tescos.
August 7, 2012, 12:36 pm
Probably not good practice to do it but I've done it many times and covered good miles with no issues
August 8, 2012, 12:12 am
It's usually not recommended to mix fully synthetic and part synthetic.
August 8, 2012, 5:54 am
yes as fully synthetic is a blended mixture of semi synthetic anyway
August 8, 2012, 3:13 pm
As confused as I was for breakfast this morning scrambled eggs or cornflakes took a whole 15 minutes debating with my self lol
sounds as if I'm best off not mixing. A few folks at works said it'll do no harm for topping up as its only small amounts going in with fully synthetic.
I'm just a sucker for a bargain.
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