Synthetic Motor Oil Brookings SD

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Automotive Service Center
(605) 692-4272, 001-2004
614 Main Avenue South
Brookings, SD
Certifications
Blue Seal Certified
Membership Organizations
National Institute for Automotive Service Excellence (ASE)

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Napa Auto and Truck Parts
(605) 692-4545
419 3rd Street
Brookings, SD
Services
Clutch Repair

Carquest Auto Parts of Brookings
(605) 692-6290
2405 6th St
Brookings, SD
Services
Auto Parts

Rons Auto Repair
(605) 692-4931
312 3rd Avenue
Brookings, SD
Services
AC and Heating Repair

Brookings Glass and Mirror
(605) 692-7373
610 12th Street South, # 103
Brookings, SD
Services
Auto Glass Repair

Exhaust Pros
(605) 692-6200
302 4th Street
Brookings, SD
Services
Auto Service & Repair, Brakes Service & Repair, Mufflers & Exhaust Systems Service & Repair, Trailer Hitches Wholesale & Manufacturers
Hours
Mon-Sat

Dales Alignment Service Inc
(605) 692-5712
1006 Main Avenue South
Brookings, SD
Services
Alignment Repair

Bonde Signs & Designs
(605) 693-3581
2333 16th Ave W
Brookings, SD
Services
Auto Body

ASC Automotive Service Center
(605) 692-4272
614 Main Avenue South
Brookings, SD
Services
Transmission Repair

I 29 Truck Shop
(605) 693-6900
1527 30th Avenue
Brookings, SD
Services
Truck Auto Body

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Synthetic Motor Oils

William D. Siuru, Jr., PhD, PE   

Seeing the ads for synthetic motor oils, you may ask yourself, "is this something that I need for my engine?" And, "are they are worth the extra money?"

Conventional mineral motor oils are refined using crude oil for the base stock. In contrast, the base stocks for synthetic oils are man-made organic esters and other synthesized hydrocarbons. Produced from crude petroleum, minerals oils contain impurities like nitrogen, resin, asphalt, wax, carbon, sulfur and aromatic residues. Refining removes most impurities, but some still remain to cause problems especially under high stress and temperatures. Synthetic oils are developed in the laboratory to provide the exact characteristics desired. These "designer" oils include no impurities at least when poured from the can. Impurities can, of course, appear during combustion.

Synthetic oils can tolerate much higher operating temperatures, for example when towing or hill climbing in warm temperatures with the air conditioning operating. Even the best mineral-based motor oils breakdown or oxidize at temperatures of 250 degrees F to 300 degrees F. Above this, the life of these oils drops drastically resulting in increased engine wear and formation of harmful sludge, varnish and other deposits. Synthetic oils can easily tolerate temperatures up to 450 degrees F and some can go up to 700 degrees F. With synthetic oils there are no impurities to start with so they can resist oxidation up to ten times longer.

An oil's viscosity index (VI) describes how the oil's viscosity changes with temperature. The higher VI, the greater the viscosity stability and the ability of an oil to retain its viscosity by resisting shearing at high temperatures and engine speeds. Shearing reduces an oil's ability to lubricate by tearing away and thinning out an oil's film that prevents metal-to-metal contact. Synthetic oils have a much higher VI and thus viscosity stability.

Synthetic oils also work better at low temperatures because they flow much more freely right down to -40 degrees F to -50 degrees F. Wax, not found in synthetic products, that congeals at low temperatures is the culprit here. At very low temperatures, mineral oils can become so thick they will not flow at all. Naturally, this makes for much easier winter starting. Also synthetic oils start lubricating much sooner and reaches the upper valvetrain much faster. These first few moments of operation are by far the toughest wear engines see.

Synthetic motors oils are much less volatile and are thus likely to be converted from liquid to vapor. Petroleum motor oils can lose as much as 25% of their weight when the light hydrocarbons are vaporized. Synthetic motor oils remain stable at high temperatures, losing perhaps only between 5% to 10% of their weight to vaporization. This mean lower oil consumption as well as reduced exhaust emissions. Because synthetic oils are more slippery, friction is reduced. Howev...

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