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    Safe to go from 5W30 to 5W20 in older 91 Civic?

    I am curious to hear the thoughts of our members here on a position I am considering. I bought a 1991 Honda Civic Si with the 1.6L motor a little less than a year ago. It has ~215k miles. As far as I know it has used strictly 5W30 or 10W30 prior to me obtaining it. I have since gone through two...
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    Have you seen Rotella T5 0w30/40 at the store yet?

    I was doing a bit of internet research this afternoon and came across the Product Data Sheets for Rotella T5 0w30 and 0w40 through the Shell Canada website. I find it odd that both are not listed on the Rotella USA website though. Are they new and upcoming and just not on the market yet? Are...
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    Why are Chevron/Havoline Syns so hard to find?

    I've always been a fan of the Chevron/Havoline family, using both Chevron Supreme and Havoline conventional quite often in the past. I was curious to know if anyone had a clue as to why the Chevron Delo 400 LE Synthetics and Chevron Full Synthetics, specifically their 0w30 and 5w40, and also the...
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    Can short shifting actually cause wear to a motor?

    I was searching through past UOAs specifically concerning Honda motors and I found this one here: http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1716917#Post1716917 Regarding point #4 the thread creator says "Short shifting for fuel economy could be causing some sort...
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    What oil would you use on a 1991 Civic Si w/ 215k?

    I just bought my son a completely stock 1991 Civic Si with the 1.6L motor. I'm actually somewhat jealous considering the near showroom condition almost 20 years later. Picked it up from the original owner with all records etc. etc. Seems like it will be a fun car for him to drive around...
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