Product details
Mannol 9990 Motor Doctor Engine Oil Additive – Top-Notch Engine Protection and Coating
Looking to give your engine a bit of a boost and keep it ticking over for longer? The Mannol 9990 Motor Doctor engine oil additive could be just the ticket. This handy 300ml bottle is designed to ramp up your oil pressure and cut back on oil consumption — especially handy if your motor’s had a few miles on the clock or you’re simply keen to keep things running like clockwork.
So, what’s the magic behind it?
Well, this additive forms a protective lubricant film over all those rubbing parts inside your engine. It stops oil from sneaking into the combustion chamber, which means less soot and a lot less of that annoying smoke older engines tend to puff out. And don’t think it’s only for the old timers — it’s just as useful in newer engines, helping to reduce wear and tear and give your engine a longer lease of life. Plus, if you’ve ever cursed at a chilly morning start, you might find this stuff makes those cold starts a bit more bearable.
Who’s it for?
Whether you’re behind the wheel of a petrol or diesel car, a commercial vehicle, or pretty much any engine-powered machine, this additive is a solid fit. It plays nicely with both synthetic and mineral oils, so no need to fret about compatibility. Just pop it into your engine oil, give the motor a warm-up, and you’re all set. One 300ml bottle covers up to 6 litres of engine oil — perfect for most everyday cars.
Why go for Mannol 9990 Motor Doctor?
- Boosts oil pressure, which is crucial for keeping your engine properly lubricated.
- Reduces oil consumption, saving you a few quid and the hassle of topping up.
- Shields your engine from wear and tear, helping it go the distance.
- Keeps engine smoke and soot at bay for a cleaner, smoother run.
- Compatible with all common engine oils — synthetic or mineral, no worries.
- Simple to use anytime, no need to wait around for your next oil change.
Of course, every engine is a bit different, so results can vary depending on how you use your motor and its condition. But plenty of drivers swear by it as a handy addition to their maintenance kit. Just remember to let your engine warm up after adding the stuff — and you can do that whenever, no need to time it around oil changes. If you’re after a straightforward, effective way to give your engine some extra TLC, this could be well worth a go.

