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  1. zray1

    Ambient air temp over 105 every day

    Is there any advantage to using Mobil 1 5w-40 vs Mobil 1FS 0w-40 Will be putting 5,000+ miles on the car before temps get down to the 90’s. The car is a 2002 Jaguar XKR, supercharged 4.0 liter V-8, that has a typical oil temp in the summer of 215 F to 240 F. Coolant temp generally 15-20 F...
  2. zray1

    MAHLE OC 323 Oil Filter vs Mann-Filter W 719/7 Oil Filter

    Are these filters equivalent in quality, or is one brand considered better ? MAHLE OC 323 Oil Filter vs Mann-Filter W 719/7 Oil Filter Z
  3. zray1

    Do these two oils differ substantially ?

    Mobil 1 5w-40 European formula FS /X2 vs Mobil 1 5w-40 Formula M The only labeling difference I see is the Formula M meets the 229.5 spec. and the other bottle doesn’t mention it. How to find out the difference between the 229.3 and 229.5 specifications ??
  4. zray1

    Why switch to a high mileage oil ?

    After reading over numerous high mileage topics I still don’t have any definitive answer to the question, “why switch to a high mileage oil”. I don’t especially think of my daily driver 2002 Jaguar XKR as being a high mileage car as it has just 175,000 miles on it over a 20 year time period...
  5. zray1

    Why bother with a synthetic blend ?

    Not a trick question. I really am curious to know the reasoning or appeal of buying a blend vs conventional or a full synthetic product . Do any synthetic blend products actually list the ratio of synthetic to conventional oil on the label ? Is there any way for a consumer to know if they are...
  6. zray1

    How does this Mann oil filter perform ?

    Mann oil filter # W 719/7 It’s a regular spin on type filter that I’m going to be putting on my 2002 Jaguar XKR with 171,000 miles. It’s my daily driver, so I’m wanting to keep it in as good of condition as possible. I have been using the Jaguar branded filter, I don’t know who makes it for...
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