![How and why should you clean your engine before the oil change | Engine lubricant, Engine cleaner | Bardahl How and why should you clean your engine before the oil change | Engine lubricant, Engine cleaner | Bardahl](https://english.bardahl.fr/getmedia/f5a67fec-16c1-491b-bf5d-9de53ee124b5/oil-sludge.jpg;.aspx?ext=.jpg&width=993)
How and why should you clean your engine before the oil change | Engine lubricant, Engine cleaner | Bardahl
What's the safest way to remove engine sludge, oil flush or using a thin grade full synthetic motor oil? - Quora
![Engine Sludge Causing Smoking on Starting - Can it Be Fixed? - Maintenance/Repairs - Car Talk Community Engine Sludge Causing Smoking on Starting - Can it Be Fixed? - Maintenance/Repairs - Car Talk Community](https://global.discourse-cdn.com/cartalk/original/2X/e/ea64b31004f8804b37dadee6a1bc004508a5af26.jpg)
Engine Sludge Causing Smoking on Starting - Can it Be Fixed? - Maintenance/Repairs - Car Talk Community
![If I look under the engine oil cap and see a sludgy mess instead of regular oil, do I need an oil change? - Quora If I look under the engine oil cap and see a sludgy mess instead of regular oil, do I need an oil change? - Quora](https://qph.cf2.quoracdn.net/main-qimg-9c89157e81bde48aa48e9adbc26af9ca.webp)