Multi-Grade or Multi-Weight oil is oil that has additives added to change viscosity of the oil at different temperatures. This allows the oil to flow differently at hot or cold temperatures. This type oil is designated with 2 numbers. The first number is followed by the letter W. The first number indicates the weight of the oil in cold temperatures (Winter). The second number indicates the weight of the oil in normal (hot) temperatures. This multi-weight allows the oil to flow easily when it is cold which protects the engine from excess wear when it is started when it is cold. It then thickens when it is hot to allow for better protection of a hot engine.
I have a 2005 trailblazer and it recommends a multi-grade oil for the enine. Mine is 5W-30. There is not much difference in the multi-grades like 5W, 10W and such, but I would stick to a Multi-grade of some sort.
No.First the viscosity is wrong. SAE 30 is a single-grade motor oil. The 30 is a designation of the oil's viscosity grade according to the SAE. The 25W-50 is a multi-grade motor oil, meaning 25 grade viscosity in Winter (hence the "W") and 50 grade viscosity in normal operating conditions. If you wanted to match a multi-grade motor oil in viscosity to a SAE-30 grade oil, then you would need a multi-grade oil that had ended in 30, for example 10W-30.Second, if you have been using a single-grade motor oil, you should not switch to a multi-grade because most single-grade motor oils do not have the detergent additives found in multi-grades. Switching to a multi-grade with a detergent present could suddenly dislodge gunk deposits creating a problem with solids and significantly decreased lubricant performance.Now, with all that being said, if you drive a really old diesel truck and change your oil constantly, then the 25W-50 would probably be a great choice. Since the extreme pressure and heat in old vehicles tends to thins the oil, the high viscosity is probably helpful. And, if you change the oil often, the detergent will do you more good then bad.
I NEVER USE A MULTI GRADE OIL I USE A STRAIGHT 30 WEIGHT DETERGENT
any good multi grade oil will work fine.
You should use a 30-weight motor oil, NOT a multi-grade such as 10-W-40. Use of multi-grade oil will increase your oil consumption considerably. Check your owners manual, nearly all Briggs engines made in the last 10 years recommend a multi-viscosity oil, namely 10w30. However, if not used below 40 degree temperature's, 30w detergent oil is fine as it is shear stable (will not degrade to a 20w under high heat).
Multi viscosity if you are in a colder clime, if not straight 30. It's better to go with a heavier oil on older engines for better sealing.
The Grade of oil you use depends on Mfg specifications, and personal preference. I personally use "Castrol" grade 20/50 because it is a quality oil, and multi-viscosity. Meaning that when it is cold it is this, and as it heats up in get thicker. If you are asking what SAE Grade oil is, it is the Society of Automotive Engineers grading oil by viscosity, or the size of the globules of the oil. the smaller the number the thinner the oil 5 is thinner than 10 etc. Mutiviscosity is a combination such as 10/30 or 20/50.
It could be bi- or multi-.
Im am asked this alot. The type of OIL used in any lawn mower or lawn tractor depends on where YOU LIVE... In the South you use only SAE-30, in the NORTH you can use SAE-30 and some multi-grade oils 10w 30 is about the best for use in the north if you choose to use multi-grade oils. SAE-30 will allow the engine to last longer when in use under high temps, as multi-grade oils change viscosity when being heated and does not work well in the southern regions.
Use 5W30 multi grade oil. Always use a good quality oil and change every 5,000 miles or six months, whichever occurs first.
bigger than an amoeba makes it multi-cellular
sorryy.i dont know.....