Formula Shell

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BlueOvalFitter

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I just did an OCI with Formula Shell 5W20 conventional oil. Any ideas as to how long it can go (miles) until the next OCI? I travel about 85-90% highway miles.
 

pbm

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VI index of 241 is awesome (if true). I'm interested in Caterham's opinion on this 'conventional' oil.
 
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Formula Shell is a fine oil. I use it exclusively now that I can get it at BJs for about $2/qt during their annual or semi-annual instant savings sale. All highway miles, you can probably easily run it for 5000-7500 miles.
 
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I ran it for 5-6K in both of the Hyundais with no issues. Both cars were mixed driving (mostly in town). I think with the amount of highway driving that you are doing, 6K would be a nice round number. wink
 
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