After using Caltex Revtex for ~4000kms I decided to get the oil changed to Castrol Active 4t extra. While the Revtex was put through the test in the rough terrain and weather of Ladakh, Active extra had to prove its worth in the deserts of Rajasthan with several continues high speed stints.

Here is my take on these oils:Â

Before using Caltex Revtex I was using a 20w40 in my motorcycle, within 100kms of oil change, the effect was noticeable with the gear box and clutch actuation getting smoother. While Revtex with the engine wasn’t as harsh as before, but it still had some rough edges especially after prolonged saddle time.

While Castrol Active 4t extra performed well on this front, with the clutch actuation getting smoother and even prolonged abuse making little impact on performance. My biggest worry with Castrol was viscosity taking a nose dive after 400kms, like it does in Castrol Active 4t and Power 1. However I was relieved to find the viscosity remained the same; however it did start to go down after 900kms. Thus causing the clutch and gear box to get a little rough after hard riding.

While I liked both oils, there was nothing exceptional in either of them that would make me pick one over the other. While I would pick Revtex for the value and it ability to deliver same level of performance throughout oil change interval, Active 4t extra gets my vote for better clutch actuation and smoother operation, however I would only pick it up if I intend to change engine oil every 1000-1200kms.

My quest for perfect 20w50 engine oil for my motorcycle lives on, while the ghost of the performance delivered by BP Mak 4t 20w50 still lives on…

Caltex Revtex

Oil grade: 20w50 API SG JASO MA

Mrp: Rs.121 per liter

Plus: Viscosity remains the same even after 2000kms, cost

Cons: lighter and thinner than normal 20w50 oil, availability

Castrol Active 4t extra

Oil grade: 20w50 API SL JASO MA

Mrp: Rs.157 per liter

Pro: Smooth gear box and clutch operation

Cons: lighter and thinner than normal 20w50 oil, starts loosing viscosity after 900kms, cost

This review is based on what I experienced on my four and half year old, 50000km clocked Pulsar 180. Experience might vary depending on the motorcycle and driving conditions.

If you have used either Caltex Revtex or Castrol Active 4t extra, please do let us know what you feel about them.