In Dec 2012 I purchased a used, one owner xc90 3.2 v6 with 112k and after driving1500 miles it used 1 qt of oil. The oil was changed by used car dealer and I do not know what brand or weight was used. The question I have is according to the owners manual for the 2007 they recommend you can use 5W30 for temperature range from -22 degrees to 86 degrees. If the outside temperature is over 86 degrees they recommend 0w30 or 0w40. For 2008 xc90 same engine they change their recommendation for 5w30 use from -22 degrees to 104 degrees. They also recommend you can use 0w30 or 0w40 for temperatures up to 104 degrees. Do you think this is a misprint as far as using 5w30 for temps up to 86 degrees for 07 and 5w30 for temps up to 104 degrees for 2008. I am looking for some guidance as to what viscosity to use since the vehicle used 1 quart of oil in driving 1500 miles. I live in Pennsylvania and plan on using a full synthetic but have no knowledge about which brand to use and if the engine uses 1 qt per 1500 miles at what mile interval would one change the oil if every 1500 miles I am adding a quart. thank you in advance for any input. jimbob
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