oilman

Ideal Cheers, Guy

Yup and cheap ones, but I do not tend to recommend those for track use

As you say Motul is one, such as Motul Sport, Millers CFS or their new EE Performance range, Fuchs Pro S, Gulf Competition to name a few. These are performance/track/race oils but are fine for road use and many more than you may think run them daily. Then there are premium quality oils that are fine for some track use, Mobil, Castrol, Shell and many many more. The point I am trying to make here is the Tesco own brand thing, and the difference you will find between that and a premium or track/race spec oil. They are night and day. One is toll blended to the lowest cost for Tesco, the others are premium quality oils and that is reflected in their performance on and off track. Like everything in life, you can buy quality or you can buy crap, but is important to know the differences between the two. Tesco's own 5w-40 and Castrol Edge Titanium 5w-40 are very different animals from one another. You said it yourself, you would not use it in a fun car although you have no logic for that. I would argue you do have logic, or you wouldn't think twice about it. The answer to your logic is, Tesco own brand is not built to the quality you want on track, would you trust it? As I said in ealier posts its all about how the oil can cope with it, and shearing down under hard use on track. Shearing means the oil is thinng, breaking down, you don't want that on track. The engine will not thank you for it. Cheers Guy

I understand all of that, it does not change the fact Tesco own brand is made to a cost as low as possible and is not designed for track use. Engine oil does not know if it is in a road car or a race car, it knows what kind of stress it is getting and what it can cope with. There is quite a difference between an own brand road oil, and one that is designed to cope with track use and it is all to do with the shear stability of the oil, and this is not reflected by any specs the oil may, or may not meet. It is not dissimilar to tyres, you can do a track day with ditch finders, or you can use a quality tyre. They both meet the same DOT rating for road use. There are plenty of oils fine for both road and track use, but I would not class Tesco's own as one of them. Cheers, Guy

Yup, does not mean it is any good for track use though. Cheers, Guy

The Tesco own is made to a cost, and that cost does not account for track use. FIne for road if you are on a budget, but for track use something designed for and up to the job Cheers, Guy

Most dealers will not know what an ester oil is, they will just have a barrel of correct spec oil to cover many cars. Total is a quality brand and 5w-30 is fine, so the knocking should not be due to the engine oil. Cheers, Guy

You will be fine with Millers

The oil will not have an effect on weather the engine starts or not. But if it has been sat since 2019 it will need changing sooner rather than later. Cheers, Guy

Just to clarify, the spec required for your car is API SN 5w-30. When you put your reg into our look up guide it looks for all 5w-30 oils that meet API SN as they are suitable. If they meet other manufactures specs as well it does not matter Cheers, Guy