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Thread: Have a question about switching oil...

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    5w-20 or 5w-30?? dealers says one thing and under the hood says another... will be doing this myself from here on out. will be switching to royal purple too.
    might as well tell me what filter to use too...

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    on 00's they called for 5w30. Around 02 ford switched to recommending 5w20 for a very slight gain on CAFE standards or something like that, but didn't change anything with the engine.

    Stick with 5w30! The oil pressures look more stable as well when you're not running 5w20 pisswater either lol

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    I "BEG" all of you, please dont put Penzoil. I actualy switched on saturday to freaken penzoil and my service light is now on! i even feel my truck riding different, and its an everyday driver. I was useing Moblio 1 oil and I dont know why i switched but im changing my oil tomorrow. Worst thing ever! Penziol SUCKS.

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    2002 with 71 thousand miles? should i be using 5-30 as well?

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    Quote Originally Posted by Harley002 View Post
    I "BEG" all of you, please dont put Penzoil. I actualy switched on saturday to freaken penzoil and my service light is now on! i even feel my truck riding different, and its an everyday driver. I was useing Moblio 1 oil and I dont know why i switched but im changing my oil tomorrow. Worst thing ever! Penziol SUCKS.
    I've heard things about that with Penzoil and Quakerstate...something to do with higher parafin (wax) content or something I just remember them by "Penn" and "Quaker" both being Pennsylvania related, so I steer clear of those 2 brands. Whether its fully true or not, I've never heard similar claims with other brands, so I always stick to Mobil 1 for full-syn DD's, Motorcraft for syn-blend DD's, and conventional Valvoline for the race truck and old truck.

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    I use Amsoil 0W-30 and have for years in all my engines. Amsoil in my bikes as well. Can't say enough good about their products. I also use their filters. Price is out the roof, but excellent products.

    http://www.amsoil.com/mygarage/vehic...+F150 PICKUP+3

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    I've used Mobil1 oil & Mobil1 filter since i have had the truck.
    Here is a little info on the Mobil1 vs Ford Motorcraft FILTER.

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    Amsoil? Never heard of it. Im most likely going back to Mobil 1full syn and the Mobil 1 filters. Im just not sure what number to use with the oil now. What you think?

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    Whats the difference between using 10w-30 and 5w-30 oil....

  10. #25
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    Quote Originally Posted by BLACK MAMBA View Post
    Whats the difference between using 10w-30 and 5w-30 oil....

    Here's something I found...thought it might help answer your question..


    "When you see a W on a viscosity rating it means that this oil viscosity has been tested at a Colder temperature. The numbers without the W are all tested at 210° F which is considered an approximation of engine operating temperature. In other words, a SAE 30 motor oil is the same viscosity as a 10w-30 or 5W-30 at 210°. The difference is when the viscosity is tested at a much colder temperature. For example, a 10W-30 motor oil performs like a SAE 10 motor oil would perform at the cold temperature specified, but still has the SAE 30 viscosity at 210° F which is engine operating temperature. This allows the engine to get quick oil flow when it is started cold verses dry running until lubricant either warms up sufficiently or is finally forced through the engine oil system. The advantages of a low W viscosity number is obvious. The quicker the oil flows cold, the less dry running. Less dry running means much less engine wear. A 10w40 oil has a higher weight at 210* than a 10w30 oil. Obviously the use of a 10w40 in a modern engine would be foolish. Modern engines are built to much closer tolerances than engines of a decade ago. 10w40 does not flow as well at 210*, this causing engine wear."

    My conclusion...5W-30 is better than 10W-30 in colder temps. Not a big worry here is Sunny South Florida.
    Last edited by Merlin; 01-04-2011 at 12:34 PM.

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    Cool

    Quote Originally Posted by walter123walter View Post
    Go Royal Purple you wont regret it.
    117k on Royal Purple

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    I use Mobil 1 for my Cobra, so I'll use it for my Harley as well. What's the filter number needed for an 03 Harley and how many quarts will the engine hold?

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    Thanks. How many quarts does our engine hold?

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    Mobil 1 is the shiznitch. Use it I'n every vehicle i own, especially my service trucks I'n the field!!


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    2009 seadoo RXP-X riva waterbox with rude rear exhaust outlet, Rude upgraded bigger supercharger, riva sponsons, fuel pressure regulatoR, RIVA pro blocks, riva rear air, solas prop, custom riva racing ECM, intercooler upgrade, intercooler relocation bracket,60lb injectors

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