The smaller the number, the better it will flow. Any copying or reproduction of information from this are buying/using. more specific in what the performance of the oil actually is. in control of oil consumption and piston deposits, uses low emission test While most manufacturers recommend a certain grade of oil for your vehicle, selecting the right one has got a lot to do with the way you use your vehicle and what kind of weather you use it in. diligence and tenacity. If the manufacturer recommendation for your vehicle is 15W40 and you tend to push your vehicle to the limit more often than not, you can upgrade to a 15W50 instead. at 100°C etc. be used where API CD, CE, CF4, CG4 and CH4 oils are specified. and depending on the performance level of your car are best ignored if C2-04 Petrol and light duty Diesel engines, based on 10w-40, 5w-30 etc for Motor oils and 80w-90, 75w-90 etc for Gear oils) fall within certain viscosity limits at 100°C. lower the number, the thinner the oil: a 30 oil is thinner than a 40 oil To start with, let’s first understand how these grades are read and to put it in extremely simple terms we shall take 5W30 grading as an example. weight or watt or anything else for that matter) simply means that the This article is not intended to provide a complete recommendation of all possible applications for these fluids or for all gear sets. catagories as follows: A1 Fuel economy petrol for certain indirect injection engines, CF2 - Introduced 1994 - defines effective API GL-5 – Intended for heavily loaded gear sets with high sliding forces such as hypoid differentials. In India this number doesn’t really hold much significance mainly taking into account the fact that the temperature variations here aren’t really drastic, but in countries where the temperatures can get extremely low, this unit is of utmost significance. Most oils on the shelves today are "Multigrades", multi cylinder test engines, CF4 - Introduced 1990 - further improvements While the ‘W’ in 5W30 stands for winter. low SAPS, two way catalyst compatible. and better quality/performance than the older ones. Motor oil, Gear oil etc) The viscosity (i.e. SAE 50 Engine Oil – While not strictly a “gear oil,” this type of lubricant is often the recommended lubricant for some manual-shift truck transmissions. ) systems are fitted and with fuel containing up to 0.5 % sulphur. then look for SL, SM, CH4, CI4. and the cheaper the oil the cheaper the ingredients and lower the performance oil must have a certain maximum viscosity/flow at low temperature. Your handbook will specify whether a 30, 40 or 50 etc more up to date oils. If you want a better more up to date oil specification A3 High performance and/or extended drain version of CD, reverts to single cylinder low emission test engine. B5 Combines B1 fuel economy with B3/B4 performance. The 40 in a 10w-40 simply means that the oil must The “W” stands for winter, not weight as many people think. You will receive all the communications on : rvmp_story,rvmp_similar_cars_slider,rvmp_forum_ask_car_owner,rvmp_faq_widget,rvmp_qna, Oil Guide: Oil specification, grades explained, Motorists are often perplexed by the grades mentioned on oil cans and what significance they hold. GL-1 gear oil. In a 10w-40 for example the 10w bit (W = winter, not Multigrades were first developed some 50 years ago This is the more basic as it is split (for passenger and Sulphur. HTHS. AGMA Viscosity Grades for Enclosed Gearing Oils marked ‘comp’ are compounded with 3 to 10% fatty material. The purpose for which it is intended (i.e. a breach of copyright and will be pursued through the courts with due The climate temperature will help you determine which motor oil grade is best for you. 10w-40 etc) most common in the UK being VW, MB or BMW but do not be misled into thinking Your question has been submitted. diligence and tenacity. engine, CF - Introduced 1994 - modernised diesel engines, CG4 - Introduced 1994 - development You would not for example put an Automatic Transmission Oil or a Gear Oil in your engine! Kia Seltos Scores 3 Stars In Global NCAP Crash Test: What’s Our Opinion? oil in summer. We’ve all seen 5W-30 or 10W-40 on oil bottles before, but what do they mean? Viscosity is a fluid’s resistance to flow at a specific temperature. etc). Drivers Technology Ltd. All rights reserved. Note: SAPS = Sulphated Ash, Phosphorous To be blunt about the subject, if a bottle of oil does not contain the following basic information then DO NOT buy it look for something that does! Thanks for reporting this. what does it mean? test engine only, CE - Introduced 1984 - improved control what is written on a bottle of oil, and therefore have no idea what they Obviously, it is easier for thinner oil to flow across into the engine. Some of the older OEM specifications are listed here cheapest of mineral oils. low and high sulphur fuels. While the engine oil becomes thin at higher temperatures, it still needs to be thick enough to ensure that it continues to protect your engine. The ‘5’ in 5W30, denotes the viscosity of the oil when the engine is cold. Motor on volatility limits, SL - Introduced 2001 - all new engine performing more up to date oils. A2 Standard performance level (now obsolete) cars) into two catagories. All oils are intended for an application and in general and soot entrainment. GL-5 lubricants contain high levels of extreme-pressure additives to provide protection under boundary lubrication conditions. The grade of oil you choose should be in accordance with the manufacturer’s recommendations which can be found in the owner’s manual. Viscosity, in simple terms is the thickness of the oil. for something that does! Viscosity is a fluid’s resistance to flow at a specific temperature. both petrol (S) and diesel (C) specifications. performance of the oil and whether they have met or passed the latest 10w-40 API GL-4 – Intended for gear sets with light to heavy load and sliding forces. An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. both API and ACEA ratings), 4) The OEM Approvals that it carries and the codes tests, or whether the formulation is effectively obsolete or out of date. These oils are designed primarily for low-use manual transmissions. A = Petrol, Certain statements are made that are meaningless and control of cylinder deposits and ring face scuffing, intended for 2 stroke The higher the number, the thicker or slower flowing it is, which changes the nature of how it coats internal engine components and protects against heat and friction. However, it is best to consult your mechanic before you make the change or simply stick to what the manufacturer recommends for your car. B4 For direct injection car diesel engines An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. For example, 10W-30 oil will thin out at higher temperatures faster than 10W-40 will. are not interchangeable. Let’s look at how motor oil grades are classified and explain what the numbers on the bottle mean. Most of them are obsolete for automotive purposes at this point, with only GL-4 gear oil and GL-5 gear oil being used in modern vehicles. and all oils that end in 40 must achieve these limits. Numerous tests are conducted by the Society of Automotive Engineers to understand how affectively the oil performs at -17.8 degrees Celsius (0 degrees Fahrenheit) and 100 degrees Celsius (212 degrees Fahrenheit). levels. They’re all a little bit different. BREAKING: Get Your Cheque Books Ready For The KTM 250 Adventure, Facelift Toyota Innova Crysta Launch Imminent: Five Things You Should Know, 2022 Honda Civic Prototype Revealed, Looks Like A Smaller Sibling To The Tenth-Gen Accord, Tata Tiago XZ diesel: 3000km Long Term Review, Interact with car / bike owners & experts.