Lubricant Guides

Three Castrol passenger car ranges that are often confused. What separates Edge, Magnatec and GTX, and why the viscosity grade on the bottle is not the whole answer.

Ovens, kilns and stenter frames destroy ordinary chain oil. Why high temperature chain lubricants behave differently and how to apply them.

Corrosion between machining and despatch is avoidable. How dewatering and film forming corrosion preventives work, and how to choose one.

Neat oils and water mix fluids do different jobs. How the Castrol metalworking ranges divide up and which one suits your machining operation.

Rotary screw, vane and reciprocating compressors place different demands on the oil. How to select an Aircol grade and why drain intervals matter here.

ATF is one of the easiest lubricants to get wrong. Why transmission fluids are not interchangeable and how the Castrol Transmax range is structured.

Both are heavy duty diesel engine oils and they suit different fleets. How to decide between Castrol Vecton and CRB, and where Agri fits in.

What NLGI numbers actually describe, why thickener type matters more than most buyers expect, and how the Castrol Spheerol range is organised.

Castrol offers several industrial gear oil ranges and they are not interchangeable. Here is how Alphasyn, Optigear and Alpha differ and when each one earns its place.

NSF H1 registration applies to specific products, not to brands. What the category actually means and where Castrol Optileb fits in food and beverage production.