re: All about diesel engine oils Quote:
Originally Posted by amitk26 @ Vikram
Though API CH4 /CI4 may be obsoleted elsewhere however
in India we are still at Euro 4 standard and the highest grade oil
in most of the Engines usually is CI4.
API CJ4 came with low ash content for Euro 5 engines but most oils
in India ( Castrol, Shell, HP, IOC etc) are still not yet CJ4 compliant.
API CK4 spec is out however very few engines of imported cars would need CK4 grade oil as of now and most probably the oil would be imported too.
India is going to jump to Euro 6 in 2020 skipping Euro 5 and probably we will be moving to CK4 with it.
I had a discussion with Castrol oil expert last year at Prerna Motors during an event and as per him Castrol GTX is right oil for CRDi Diesel engines.
Earlier Castrol GTX was API CH4 however they upgraded it to API CI4 after Tata and Mahindra moved to API CI4 grade in engine specifications.
Same goes for Shell Helix HX7 which is a semi-synthetic but API CF4 grade
Shell Helix HX5 Shell Rimula R4 are right grades though they are mineral. |
Yes you’re right a number of Indian OEMs (Tata/Mahindra) do specify API CH4 specification for their diesel engines.
My humble suggestion would to be more specific while giving your recommendations; in case of API specs both the grade and the viscosity range must be specified. Castrol Magnatec is one of their sub brands marketed by Castrol India and it has three variants; 5W-30 which is primarily a gasoline engine oil meets API-SN, 10W-40 & Diesel 15W-40 that are for dual use and meet API SN/CF. Castrol GTX has four variants; GTX Ultraclean (API SN), GTX 20W-50 (API –SL), GTX Diesel 15W-40 (API CH-4) & GTX CNG meant for CNG engines (meets API SG/CD).
As for Shell; “Helix” is their engine oil range primarily for gasoline engines (for the most part) & Rimula is their commercial diesel engine oil range. Shell’s Rimula range that they market in India is actually much more comprehensive with close to 20 variants.
One important thing that needs to be understood here is that API diesel engine oil specifications are meant for heavy duty on/off highway engines for most part and not for light duty engines that are typically employed in passenger cars.
As most of the passenger vehicle OEMs operating in India (barring Tata, Mahindra) use smaller cubic capacity diesel engines that use some kind of turbo charging/common rail direct injection technology sourced from their European subsidiaries and they are unlikely to adhere to API specs in most cases and will have either their use their own in house specs (Fiat, VW, BMW, Mercedes Benz, Renault/Nissan) and/or ACEA specs. I do not really know what direction will the Indian duo (Tata/Mahindra want to take) and if they are willing to spend hundreds and sometimes thousands of crores in addition to a number of years required to develop brand new engine platforms or will they find it easier to source the engines required for their passenger vehicle lines from some European manufacturers. Although I must mention that in recent years both TATA & Mahindra have developed some good engine platform but they will have to quicken their pace as Euro VI norms are going to hit India in a couple of years. That in turn will also drive the availability/marketing of the engine oils following a particular regime.
In the commercial space you have Volvo, Scania and Mercedes & MAN manufacturing their heavy duty on/off highway trucks and they follow their own Volvo, Scania, MB & MAN specs and not API specs. Then you have the two major players; Tata & Mahindra Navistar that actually employ engines that require oils adhering to API specs but given the abysmal quality of diesel available in India with 350 ppm of sulphur & widespread adulteration I don’t think they will require CJ-4/CK-4 spec oils any time soon.
And therefore by corollary you will not have the multinational oil majors selling diesel engine oils that meet API CJ-4/CK-4/FA-4 specs anytime soon.
Having spent close to 22 years in the lubricant sector I frequently hear this refrain that “this was the oil suggested by a mechanic or a (smart aleck) service advisor” and most of the time these recommendations are incorrect and driven more often by the commercial considerations such as what’s available in the inventory/higher profit margin etc.
My humble suggestion/recommendation is that please read your owner’s manual that explicitly states the particular grade of oil to be used in that engine (you will also find them mentioning a particular brand/sub brand if there is a licensing agreement in place) and don’t go by what some mechanic tells you. At the end of the day it is your investment that is on the line.
Last edited by Vikram Arya : 4th March 2017 at 02:12.
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