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The Slippery Truth About Motor Oil

Hppp 060600 Oil Basics 07 Z
While we may never know for... 
   
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Hppp 060600 Oil Basics 07 Z
While we may never know for sure if this particular failure was oil-additive related, it does show what can happen when the contact surfaces of lobe and lifter wear past the break-in polishing. Both the cam and lifter were high-quality, name-brand units. Break-in and normal use included top-quality synthetic oil that met the latest standards.
Hppp 060600 Oil Basics 08 Z
Available from GM dealers... 
   
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Hppp 060600 Oil Basics 08 Z
Available from GM dealers for about $10 per bottle, Engine Oil Supple-ment (E.O.S.) carries PN 1052367 and is a highly concentra-ted mixture of several key oil additives. It is designed to protect against piston scuffing and camshaft wear during the break-in period. But because of its heavy zinc and phosphorus content--which is advertised at no more than 5 percent by weight--and the increased risk of catalyst failure from it, GM officially advises that E.O.S. is not intended for long-term use.
Hppp 060600 Oil Basics 09 Z
Most GM engines from about... 
   
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Hppp 060600 Oil Basics 09 Z
Most GM engines from about 1987 forward have hydraulic lifters with roller bearings that greatly reduce frictional contact. Many aftermarket camshaft manufacturers offer similar roller-type camshafts for our vintage Pontiacs. Because these camshafts are typically made of harder material and the roller bearing on the lifter face reduces friction, it appears they are unaffected by the recent oil changes.

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Pontiac Solstice Research
Pontiac Solstice Get updated on all your car buying needs from safety features, to specs, to crash test ratings and options. Get all the information you need if you are interested in buying a new car like the Pontiac Solstice. The L4 standard engine in the Solstice gives you 173 horsepower with an estimated 22 mpg. It has a comparable trade in value which should come in handy when you go to shop for your next car. The Pontiac Torrent and the Pontiac G6 are other vehicles that might interest you.

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