how durable is the car engine of jeep after purchase?
Wonuola, I'm not surer if you mean the brand name Jeep or are talking about a Toyota RAV4 here. They are two very different machines, despite being about the same length, height, and price. I'll give you general info about both in case you're comparing Jeep, which is built by Chrysler to the Toyota RAV4. For Jeep it greatly depends on the year & particular engine of Jeep. Also what you're planning to do with / how you're using driving that Jeep! A CJ or TJ series Wrangler with the 4 cyl are very good in the long term as road (street machines, both with automatic and standard transmissions), much better than the inline 6 cylinder engine models. The newer ones with 4 cyl are awesome as well, but they tend to be a bit thirsty in the fuel economy, as do the newest ones with the V6 since Jeep isn't a make with great aerodynamics... more like something your kids will make out of Lego. As to why poor mileage if you drive highway a lot... think of how it is to push a block thru water or a curved shape, one has a lot more resistence than the other right? Jeep build s a strong rough & tough machine but they are not fast, fuel thrifty or cheap to purchase in the 1st place. If you're mostly on decent gravel roads or pavement & want extra traction for wintertime, when it's raining hard, etc, buy a Toyota RAV4 and see about double the miles per gallon for your gas esp if you have the 4 cylinder engine & much more comfortable seating, better weather protection around doors & windows & a LOT less road noise too! It's not meant for hardcore off-roading but will give you plenty of extra grab when driving on slushy or snow-covered roads. Toyotas engines are among the best in the world, the 4 cylinder powered ones are often still going strng with half a million kilometers on them - that's over the 300,000 mile level. The V6 ones have not been around as long but show every sign of being just as durable as their 4 cylinder ones. Even the more basic Toyopta RAV4 will give you a level of comfort and handling on smooth or semi-smooth surfaces that Jeep owners can only lie awake nights wishing for too. Jeep rides rough, RAV4 rides much more civilized. Like I said, a Jeep is a much more rough surface tough job 4 wheel drive machine, while Toyota's RAV4 is an all-wheel drive safe & durable all-purpose SUV that lasts well (ie, Jeeps are known to rust heavily esp older ones, while RAV4 is known for being virtually rust-free after a dozen years! That oenI know well cause I drive a 1997 RAV$ with a 4 cylinder & automatic transmission, and about 225,000 Km on it to date, so about half to 2/3 of the lifespan of a typical RAV4 according to mechanics and other RAV drivers. Hope this was helpful.