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My240 you are right. Older high mileage cars need thicker oil and unfortuneately synthetic doesnt come in thick weights. I used 5w-30 in my brand new honda engine and it was fine. After 3,000 miles it was still full. I tried running the same oil in my gf's car with 50,000 miles and it was a quart low within a month. I use 10w-30 for cars with more mileage cause its thicker and doesnt burn as easily.
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91 Fastback SE
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