Castrol 10w-40 oil explained, Which oil for my car?

Castrol Actevo Semi-Synthetic 4T Engine Oil - Cycle Gear

Sludge can block your engine's vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It has evolved to meet the needs of consumers and vehicle manufacturers since 1968 and continues to innovate and remain a trusted brand today.

Castrol GTX Motor Oil, SAE 10W-40 - 5 qt

Sludge can block your engine's vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It has evolved to meet the needs of consumers and vehicle manufacturers since 1968 and continues to innovate and remain a trusted brand today.

Castrol GTX Drive Hard Motor Oil, SAE 10W-40 - 1 qt

New Castrol 10w60 oil approved for the M engines

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Castrol Magnatec 10W-40 Engine Oil 6L - 3414526 - Castrol

Castrol Magnatec 10W-40 Engine Oil 1L

Car oil or motorcycle oil: what's the difference?, Car engine oil explained

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Castrol 10w-40 oil explained, Which oil for my car?

What could be possible engine damage if I use 20W40 grade engine oil on a motorcycle instead of 10W40, which is the recommended grade? I did it once unintentionally and ran almost

Castrol Edge High Mileage 10W-40 Advanced Full Synthetic Motor Oil, 1 Quart