 printable version
Butter
Changing the oil produced in relation to the running car, not the season. But as change oil on the average once every six months, why not do it in the run-up to winter? The vast majority of modern motor oils - in varying degrees - all season. It is believed that it is necessary to fill in what is prescribed by the manufacturer in the instruction manual. But there are different winter - warm and slushy-and vigorously-frosty. And it is not clear whether the manufacturer assumed that its car will be used in conditions of the Russian winter, and that the oil would need "colder". If you decide to deviate from the instructions when choosing oil, you can use simple method to determine its temperature suitability - for secure. We call this method "rule of 35". The marking engine oil should include the designation of its class on a scale of viscosity SAE. For example: 15W-40. This means that the oil viscosity at minus temperatures meets the requirements for winter oil grade 15W, and at plus - for the summer oil class 40. Remember number 35. If you subtract from it, "winter" index of viscosity grade, in this example, 15, you get a quantity called the limit temperature pumpability, t. E. The temperature at which the oil will still flow. 35 - 15 = 20. This means that oil 15W-40 can be used at temperatures down to -20 ?� C. Accordingly, the smaller "winter" index of viscosity grade, the oil is "cold." 10W - to -25 ?� C; 5W - to -30 ?� C. This is the "rule of 35". Simple and useful.
| 
