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Fluids and Lubricants Motor oil, transmission oil, radiator fluid, power steering fluid, blinker fluid... wait, there is no blinker fluid. Technical discussion and analysis of the different lubricants we use in our cars.

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Old 03-16-2006, 10:55 PM   #1
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What oil should I use for high mileage?

I have about 195k miles on my car and currently I'm using the Mobil 7500mi oil. It's a synthetic blend (not fully synthetic) and I use the Nissan OEM oil filter. I change my oil every 7500 miles and I'm thinking that my car's getting old so should I switch to thicker oil? Can anyone just tell me which oil I should be using? And its grade? Thanks
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Old 03-17-2006, 04:56 AM   #2
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What weight oil are you using right now? If you're not seeing any leaks with Mobil7500 then I'd stick with it.
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Old 03-18-2006, 07:04 PM   #3
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i'm using 10w-40 and no oil leaks.
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Old 03-18-2006, 09:00 PM   #4
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If the car does not use oil between changes and does not leak, stay with what you are currently using.

Changing oil can over time cause issues due to the different additive packages in each type. High mileage oils have seal conditioners in them for instance.

A thicker oil would only rob HP and MPG (slightly) for you at this point.
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Old 03-19-2006, 02:40 AM   #5
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okay thanks. so if the oil starts to leak then I should switch to the thicker oils?
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Old 03-19-2006, 05:58 AM   #6
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Originally Posted by PeTeRtheEaTeR
okay thanks. so if the oil starts to leak then I should switch to the thicker oils?
Use AutoRX to rejuvenate the seals, clean the combustion chamber and ring packs and minimize the risk of leaks or solve a leak problem. See www.auto-rx.com and join www.bobistheoilguy.com and run a search of AutoRX in the Additives Forum.
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Old 03-21-2006, 02:21 PM   #7
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It seems like you are doing just fine, as long as you are consistent with your oil changes and don't go too long without changing....
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Old 03-21-2006, 05:15 PM   #8
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Auto-Rx isnt a bad idea, and yea just keep going with what works...
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Old 03-22-2006, 08:16 AM   #9
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what is this auto rx i use synthetic oil and i m at 180xxx
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Old 03-22-2006, 08:16 AM
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