Cheers for that Steven. I had a look thru to the bottle before I topped up but couldn't see how much I had left. As for the mc28 oil level indicator how does it let me know it's low? Can I assume either the yellow or red warning light comes on and the word Oil shows on the LCD display? Short of draining out the bottle how can I test it works? I mixed Rock oil synthesis which Tom said it had in, with new Castrol power 2t racing. So should be ok till it's pulled through.