Originally Posted by gezy
ok with you now (LOL)
yes from wales.
been looking this up today,
a lot go for ,10/ 30 castrol 20/40 and i think mec,s own oil 25/40.
so it had me thinking if i do not go for Quicksilver oil .do you all
go for Quicksilver .or what else do you all use
According to Mercruiser's owners manual the preferred order of oils is;
1.Quicksilver Synthetic Blend, NMMA FC-W rated, 4 cycle oil.
2.Quicksilver 25/40 NMMA FC-W rated oil.
3. A NMMA FC-W rated oil.
4. Quicksilver 4-cycle 25W40, nonFC-W rated oil.
5. A good straight weight detergent automotive oil per the air temp (20W for 32degrees or below, 30W for 32 to 50 degrees and 40W for 50 up.)
The shop just changed my oil and put the Quicksilver Synthetic Blend in it. I only use full synthetic (Mobil 1) in my cars and love the results I've been getting. You can't go wrong with sysnthetic, it just costs an arm and a leg.