Evan Neeft Boro has a question that almost all new buyers have, who are not familiar enough with car technologies. Are the new diesel engines in the cars that we see today going to last as long as the petrol engines?

Most of us car buyers are not very clued in about the engine technologies, and have known this as conventional wisdom that diesel engines are not supposed to be as good as petrol engines.

But these days, when it comes to value for money, buying a diesel car makes a lot more sense than the petrol version. Yesterday, the Maruti Suzuki team told CarToq that 80% of the new Swift bookings have been for the diesel variants. Only two months back, car companies including Ford told us that 70% of their Figo bookings were diesel. Also see our Diesel Decider tool

question of the day

So not only are diesel cars selling more than petrol, the percentage seems to be rising even more.

And yet, while the immediate economics is in favor of the diesel cars, there are still some questions related to performance that buyers are not always clear about.

As Evan Neeft Boro asked other CarToq members, will the diesel engine last as long as petrol? Or, do they degrade faster? When you say, petrol engines are more refined, what does it really mean for an average car buyer? What is really a more refined engine? Should a buyer really bother about this aspect?

Share your answers below. It will help everyone make better informed decisions.


  1. The new gen diesel engines are as good as the petrol engines, as they are smoother than the older ones. With proper maintenance, oil change, and use of good fuel can see good life from them. I have been using a Tata Marina TDI diesel car which has done 126000km in a lil more than 5 yrs. This is not a new gen diesel, but even though the car has aged, the engine still feels as good as new, returning

  2. but there is a question……….
    “why HONDA cars are only in petrol version “.
    may b because they do know about the diesel pros and cons……………..

  3. @ Sagar Shriwas : why HONDA cars r only in petrol because .. HONDA corp.. they dont have any expertise in diesel engines .. and they have to purchase desiel engine from either fiat or from some other manufacturer which again leads to increase in price .. which may lead to decrease in sales of HONDA CARS .. although i am waiting for HONDA CITY DIESEL version which is likely to come in 2012 .. lets

  4. new diesel engines are just gr8 in terms of technology and in mileage……after all it depend on your regular running of your car per day and how u regularly maintain the car..periodic maintanence…….well I think if u take care of your car and its maintanence do services at authorised service stations time to time…..its not difficult to maintain any vehicle or its engine it may b petrol or

  5. honda is too head weighted company that they thght they can scoop customers with their feminine but good petrols. but the truth is other cos like toyota, suzuki, mazda, nissan also have competing engines. As diesel technology got more refined..from cos like fiat..making durable, smoother and smaller diesels got feasible. no honda is also investing a lot on diesel tech. check their diesels in resea

  6. now a days diesel engines are using very evolved diesel injectors… higher compression is possible due to the cooling effect due to the very high pressure injection. but fuel in india is more often than not adultreated…leaving the injectors clogged after years of usage. so that leaves huge questions unanswered in indian case..of the life and future maintenance of diesels.

  7. @ankur, @kalyan:
    if any, then also it will b the first engine of honda on indian roads,
    and if that diesel engine do not succeed to gain place in market,
    this will b the huge loss to honda market value……….
    do u think that they will take the risk????

  8. Oh i wud ask why BMW and Mercs sell more diesels..? What is a Honda in front of these moto Behemoths?

  9. In theory, diesel and petrol engines are quite similar. They are both internal combus­tion engines designed to convert the chemical energy available in fuel into mechanical energy.

    Diesel engines consume around 30% less fuel than petrol engines and this results in much lesser carbon dioxide emissions. The diesel engines produce virtually no carbon monoxide and are much safer than petrol engines

  10. I agree with Aravind Anbu.
    Recently i have enquired about rtc buses in ap nd have found that each bus will run for 14 lacks km nd then the buses are shifted to rural areas or sold.

  11. Proper maintenance with timely services and oil change, using unadulterated fuel, not revving when the engine is cold and idling the turbo properly will easily see modern diesel engines cover 2,00,000 km or more without any issues. Diesels run at lower RPMs through their lifetime as opposed to petrols, its just they have higher pressure at which fuel is injected. If one cannot follow even these ba

  12. My Scorpio has done over 180k in six years and engine is still as good as new. still regularly clock over 140 easily.
    Just stick to the oil change schedules properly and continue to laugh you way to fuel stations.

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