Robbie wrote:

Hit Tesco's and found some nice 5w30 C3 for £9 too, so purchased enough to be going on with. Also bought some redex, not something I normally used but at £2 a bottle I thought I would give it a run. They also had the trade tins of WD40 on the same offer, but I don't use the stuff.

After all the club vouchers were accounted for the final asking price melted away. Felt like I was stealing it:

Click image to enlarge

SWMBO's just hit the mean shelves of Tesco Weybridge and cleared the shelf of the C3 stuff. Both 2l bottles!!

  

Robbie wrote:

Of course the purists will want C1 for the D4 (as per the book) for the lower SAPS, but I am yet to be convinced of that wisdom.

beanie wrote:

Please correct me, but I thought a D4 needs a C1 low ash oil to meet spec WSS-M2C934-B. Like Castro Edge C1 etc

Ultimately it comes down to personal preference but (clearly) my preference is to avoid C1 where possible.

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Robbie wrote:

Ultimately it comes down to personal preference but (clearly) my preference is to avoid C1 where possible.

No doubt you have some logic or science behind that Robbie, would you care to share ?