This Blow-By Will Destroy Your Engine Oil

This video explains why dark engine oil is not always a problem, but black oil with a fuel smell and a dropping oil level can be a serious warning sign. The real issue is blow by, where combustion gases, fuel vapor, water vapor, acids, and carbon byproducts slip past the piston rings and contaminate the crankcase. (I may/may not earn a commission from these links) Pennzoil Ultra Platinum (5W-30): https://amzn.to/4v4G5lH Oil Change Kit: https://amzn.to/4eDxAIB Engine Oil Tester: https://amzn.to/43vuDnk When blow by gets excessive, it can thin the oil, drain the Total Base Number, increase iron wear metals, damage bearings, and create a cycle of sticky rings, varnish, fuel dilution, and faster engine wear. 🔧 Blow By Warning Tricks Watch for three signs together: pitch black oil early in the interval, a strong fuel smell on the dipstick, and oil level dropping between changes. A used oil analysis can reveal fuel dilution, Total Base Number, water contamination, and iron parts per million before blue smoke, compression loss, or major engine damage shows up. ⚠️ Why It Matters Blow by turns engine oil from a protective lubricant into a contamination carrier. Water vapor can weaken oil film strength, nitrogen oxides can form nitric acid that attacks the oil’s alkaline reserve, and fuel dilution can thin a 5W 30 oil toward a lighter grade that may not protect bearing clearances under load. If worn or stuck rings are causing excessive blow by, the oil degrades faster, ring grooves collect varnish, sealing pressure drops, and the engine can move toward higher oil consumption, crankcase pressure, bearing wear, and expensive repairs. 📲 Share This With Anyone Who Needs It Send this to anyone dealing with black oil, fuel smell on the dipstick, oil consumption, blow by, sticky piston rings, short trip driving, gasoline direct injection issues, or high mileage engine problems. This is especially important for drivers who never check their PCV valve, run long oil change intervals, use conventional engine oil in a hard working engine, or want to catch oil contamination before it becomes a rebuild quote. 🚗💨🛢️ 💬 Comment and Subscribe Have you ever noticed black oil, fuel smell, dropping oil level, blue smoke, or high blow by in your engine? Comment your vehicle, mileage, engine oil type, oil change interval, and whether you have ever done a used oil analysis. Subscribe for more engine oil breakdowns, blow by explanations, piston ring failure topics, PCV system tips, fuel dilution warnings, and no nonsense maintenance advice that helps engines last longer. 🔔🔧 Disclaimer: The advice given is for DIY users and to apply the advice at their own discretion, we will always recommend having a certified technician take a look at your vehicle to give you real-time feedback on what needs to be addressed inside your vehicle. And! Do not be discouraged by the haters, if some of the information resonates with you, please feel free to share your experience!