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    Whats a good synthetic oil to use?

    I have an 03 Chevy SS I drive almost 100 miles a day to work and back. On the oil cap on my truck said use only Mobil 1. And my lube shop only pour in Castrol Syntec.
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    Whats a good synthetic oil to use?

    I'm currently using Castrol Syntec in my truck since new until I heard some bad things about them. one of them that its not a real synthetic. Is it just as good as other synthetic?
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    Mecedes SLK 230 oil weight

    Originally Posted By: importkid1 Originally Posted By: Pablo Originally Posted By: importkid1 I been hearing on some Mercedes Forums they stated usung Amsoil damage Catalyic Converters to me things don't add up. Some people just say stuff against Amsoil with zero proof. I fail to see why...
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    Mecedes SLK 230 oil weight

    Originally Posted By: Pablo Originally Posted By: importkid1 I been hearing on some Mercedes Forums they stated usung Amsoil damage Catalyic Converters to me things don't add up. Some people just say stuff against Amsoil with zero proof. I fail to see why Amsoil 5W-40 would damage a catalytic...
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    Mecedes SLK 230 oil weight

    Originally Posted By: Doug Hillary Hi, you are best to use an SAE40 oil in this motor Amsoil's Euro Formula 5w-40 is Approved by Mercedes Benz I use M1 0w-40 in mine Regards Doug I been hearing on some Mercedes Forums they stated usung Amsoil damage Catalyic Converters to me things don't add up.
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    Mecedes SLK 230 oil weight

    I been hearing too many rumors that you can use 0w20 5w20 0w40 5w40 and i'm not sure which one to use. I just want to use the proper oil weight and is recommended by the manufacture spec. According to my owners mannual they didn't tell me the oil weights. and idea? I assume it's 5w40 since thats...
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    Suggestions for Chevy Truck

    Is it true the 5.3L like 10w30 in the summer and 5w30 in the winter?
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    Suggestions for Chevy Truck

    Has anyone try Amsoil 10w30 in below 0 degrees weather I also have 5.3L vortec. I have been experiencing some weird klunking noise during a cold start goes away after 10 mins of warming up.
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    What type oil is good for a 02 Chevrolet Avalanche

    Hard to say if i'm buring oil or not haven't notice any blue smoke. I tend to loose a quart of oil around 1,000 miles and I have a 5.3L V-8
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    What type oil is good for a 02 Chevrolet Avalanche

    Does the Amsoil ASL have low oil consuption rating?
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    What type oil is good for a 02 Chevrolet Avalanche

    Its a 5.3L. mostly traffic driving condition. I normaly change the oil around 5,000 miles.
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    What type oil is good for a 02 Chevrolet Avalanche

    I have about 85,000 miles on my pickup and I do a lot of towing. Was wondering which oil is best to use. I'm currently using Castrol syntec 5w30.
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