The first thing you should always bear in mind at the time of getting motor oil is to choose one which respects the indications from your vehicle owner’s manual. You should not use motor oil different than the one prescribed in the vehicle’s manual since it could damage the vehicle.
Most newer vehicle can use a wide range of motor oils which reach certain standard. This way, once you have learnt what motor oil the car owner’s manual specifies, you might be able to choose among a range of oils that fulfill those indications and enter into the description.
One of the aspects in which certain engine oil might vary from another is about viscosity. Lighter oils assist in improving fuel oil economy as well as circulating more quickly, reaching faster upper areas when the vehicle is first started and the engine is cold. This is vital since one of the main factors that can cause engine wear is the difficulties it goes through when it starts while cold, and therefore using an oil which can be helpful in this is very imperative.
A good choice of for new cars would be a multi-viscosity 5W-30 oil which is very light and convenient for every day conventional driving. If your vehicle engine is not so new, then a 10W-30 would be a good oil choice. Also, if you usually drive your vehicle in a hot weather and at a high speed, then a 10W-30 or a 10W-40 would be a good oil to use.
If you drive in cold weather you should stay off heavy multiviscosity oils. Heavier multiviscosity oils would require hot to run easily and it could be an obstacle for the engine start and its general operations if it is used in a cold weather. If you use 30W or40W oils, you should have in mind that, although they are good for hot weathers, these kinds of oils could be an obstacle at the time of starting cold engines in cold weathers. Thus, if you use 30W or 40W oils and weather becomes cold you should differ to a straight 20W oil which would circulate easily even though the engine gets cold.