Is the engine noise louder after switching to Shell oil?

[DeMatthew]

The reasons for louder engine noise after switching to Shell oil are as follows: Excessive oil: Many car owners mistakenly believe that more oil is better. This is a misconception. There is a standard for oil quantity. If too much is added, it creates greater resistance to crankshaft rotation, affecting power output and increasing fuel consumption. Increased oil entering the combustion chamber leads to significantly more carbon deposits, increased piston movement resistance, reduced engine power, and a higher chance of knocking. Severe carbon deposits: Oil becomes thinner with use, leading to more carbon deposits. When new oil is added, the engine may not immediately adapt to the new oil's viscosity, causing higher RPMs and louder engine noise.

[DeGenesis]

After switching to Shell engine oil, my engine noise increased, which worries me a bit. Last time I changed the oil, I used Shell's Helix Ultra series, thinking it was a good brand and didn't check the viscosity label carefully. Turns out the car manual recommends 5W-30, but I used 10W-40. Thicker oil provides insufficient lubrication during cold starts, leading to increased engine noise, making it sound like a rustling noise when driving. The new oil might not have fully broken in yet, with air bubbles affecting lubrication. It's recommended to first check the oil dipstick to ensure the oil level is correct, then drive a few hundred kilometers to see if it adapts. If the noise persists, visit a repair shop to check viscosity compatibility. Switching back to the manufacturer-recommended oil can prevent long-term wear, as excessive noise not only affects comfort but may also lead to increased engine fuel consumption. When changing oil, it's best to have the mechanic confirm the old oil is fully drained to avoid mixing.

[DelArianna]

Engine Noisier After Switching to Shell Oil? I've experienced a similar issue. The likely cause is using oil with an incorrect viscosity, such as Shell's Formula Shell which may be too thin. New oil needs time to distribute fully, so noise may be louder in the first few days after an oil change. Additionally, if the oil pan wasn't tightened properly during installation, a minor leak could lower oil pressure and increase noise. Don't panic—first, check if the oil's SAE rating matches your car's manual. If it doesn't, replace it immediately. Normally, noise should decrease after 3-5 days of break-in. If the noise persists, visit a professional shop to diagnose oil pressure or pump issues with proper tools. Using the wrong oil can severely damage your engine—timely action saves money and hassle. Avoid randomly switching oil brands; each vehicle has specific requirements.

[DelBella]

After my last oil change to Shell, the engine noise increased. It might be due to incorrect oil viscosity selection. Shell offers different series from 5W to 10W, where even slight viscosity differences can have noticeable effects. New oil requires an initial adaptation period for the engine, and noise often improves after a couple of drives. If there's no change over an extended period, consider switching back to your previous oil or consulting a specialist. For excessive noise, check if the oil level is adequate - simply top up if it's too low. Using the correct oil is crucial for engine protection, and this issue can usually be resolved with straightforward measures.

[DiKevin]

After switching to Shell engine oil, I immediately analyzed the sudden increase in engine noise. The most common cause is viscosity mismatch - using oil thinner than the factory specification can lead to insufficient lubrication and friction noise. Shell's additive package may differ, potentially creating micro-bubbles that temporarily affect performance during the break-in period. Incomplete drainage of old oil during the change can also alter viscosity when mixed, exacerbating noise. Typically, the system stabilizes after about 200 km of driving. If noise persists or is accompanied by vibration, check for clogged oil filters or pump issues. Oil selection should consider vehicle model and season - thinner oils generally run quieter in summer. Safety first: consult authorized shops when uncertain. Preventive measures include recording viscosity grades during each oil change to ensure consistency.