Oil change done with wrong grade oil - damage?

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This is not true. A lot of marketing money is spent to convince people that well known brand name oil is higher quality and therefore worth spending
extra money on. All brands and generic motor oil sold in US and Canada must meet API, SAE and other standards and is of equal quality. Don't feel bad though, lots of others are fooled by this too and it applies with many other products as well.

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not all motor oils are OK. there are differences. i wouldn't go to the dollar store and buy whatever cheapo brand they have and think it's going to protect my engine in cold weather. if you want your engine to start knocking go ahead and use whatever generic made is cheapest. name brand oils are in competition for the best product so they are better than odd branded ones. maybe in the original posters case shell brand oil may be suitable for a honda but i would still prefer penzoil or castrol or quaker state or valvoline over it myself.
-jeff

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wrote:

Oil will not cause knocking. That is caused by gas that has too low an octane number for your engine.
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Gordon Zola wrote:

Oil can cause knocking if the grade is too thin. Different knocking, like main bearings. You wont have too many problems in the USA but you will in hotter climes like on the equator maybe.
Smart people use a militiary grade oil in Australia, because most oils specified for the usa market is too thin for the local market. Reverse problem
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wrote:

Even on modern computerized engines?
J.
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JXStern wrote:

I dont think a computer can pick up mechanical knocking, though it can pick up low oil pressure ? Maybe on some...
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Tom Levigne wrote:

I agree with you in spirit but not in detail. All oils have to meet the same minimum standards, but that does not mean that all oils are of equal quality. Just ask VW about that some time :). They have published a short list of oil approved to their tests which are more strict than API standards and the engines on some VWs are highly prone to sludging if only minimal quality oils are used.
All tires sold in the US have to meet certain DOT minimum requirements, but there are massive differences in performance and longevity amoungst the various tires being offered.
John
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