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    08 Silverado - Overfill or dipstick issue?

    My experience with the GM 5.3L truck engine is that some oil in a fully primed oil pump system will drain down from above the filter when the filter is removed. If the filter is not removed, I would have dumped in only 5 quarts and then added whatever fractional portion of a quart to meet the...
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    Where do you store your oil?

    Contrary to the good Dr. Haas's opinions, freezing does not render a motor oil useless. My local Mobil oil jobber stores skids of cased motor oil in an unheated metal building which is visible when the overhead door is open. I really doubt that Walmart suspends transport of motor oil from...
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    "Sopus" Oils

    The molding logo on the bottom of the bottle belongs to either the contract packager of the blended oil or the supplier of the molded bottles. It may or may not be traced to the blender of the motor oil. The "box G" of Graham is very common, along with the "triple C" of Consolidated Container...
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    Color of Virgin Oil.

    Most Grp II and up base oils are water white in color. What you are seeing is the additives plus dye!
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    The Meaning of W

    <blockquote>Quote:<hr /> This is the way I understand it and you guys can correct me if I'm inaccurate: 10W-30 = The viscosity of SAE 10 when cold. The viscosity of SAE 30 when hot. Motor oils naturally thin out {decrease in viscosity} as they increase in temperature. A 10W-30 will start...
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    What brands of engine oil are American?

    <blockquote>Quote:<hr /> We use way more gasoline than motor oil. <hr /></blockquote> A shot in the Bulls-Eye! From a 42 gallon barrel of crude oil, only 1/2 a gallon is used for lubricant production (includes greases). Other major uses: 19.5 gals - Gasoline 9.2 gals - Diesel/Home...
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    Highest HTHS of Energy Conserving Oil?

    My best guess is the 3.2 HTHS mark, such as Citgo 10W-30 synthetic, which is GF-4 & 3.2 HTHS. The newer M1 10W-30 High Mileage synthetic is 3.66, but it meets only the GF-3 cert.
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    For DIYer's, the gallon & 5 quart jugs are a real convenience for taking the waste oil to the re-cycle center! But for topping off during the OCI, I'd much rather have a quart bottle on the shelf for ease of pouring a couple of ounces down the fill tube!
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    ZDDP in OIl and Older Design Engines???

    <blockquote>Quote:<hr /> How do I know the ZDDP content of a given oil? <hr /></blockquote> Checkout the UOA forum to view the phos & zinc as listed in PPM. Used oil has some ZDDP depletion, but it is a good ballpark number. Also, some of the major oil brands will list a phos number on the...
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    AEHaas criteria and Visc. Specs

    Keep in mind that 40C is 104F degrees and probably more accurately reflects an oil sump temperature obtained during the first 5 minutes of drive time than an actual start-up oil temperature. Most late model vehicles spec'd for 5W-20 or 5W-30 are seeing cold start-up viscosities of around 100...
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    Worst oil

    I've been busy beyond belief this summer, but I'll toss my opinion into this thread: <img src="/forums/images/graemlins/wink.gif" alt="" /> As Buster commented, many users have a "least favorite" motor oil, but any PCMO with the API donut will provide acceptable performance in any engine that...
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    Polymeric Viscosity Index Improvers and Deposits

    <blockquote>Quote:<hr /> My words: Select oils with as little polymeric VIIs as you can. This is old news for many people but not for some people so I'm posting it. <hr /></blockquote> Actually, I'm 180 degrees in the oposite direction - VI Index Improvers are your engine's friend! Sure...
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    Trying to start a discussion.

    <blockquote>Quote:<hr /> You do have some proof of this assertion, yes? <hr /></blockquote> <blockquote>Quote:<hr /> Really? You have something to back up that statement. Or are you just blurting out an unqualified opinion that you read somewhere <hr /></blockquote> Before those guns...
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    Pennzoil with PureBase

    My comments on these 4 year old test results for Pennzoil 10W-30 Thin-Film Oxygen Uptake - Actually an impressive show of the ability of this 10W-30 to resist oxidative breakdown. Hi Temp, Hi Shear - Exactly the number listed on the GF-3 data sheet . A very common HTHS for a GF-3 dino. Noack...
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    10w-40 instead of 5w-30 okay mechanic says?

    Saturns can have oil burning problems and the mechanic may be aware of this issue. 10W-40 is a simple fix to obtain better ring seal to control the consumption. 10W-40 can produce some gas mileage penalties during short trip situations in the colder winter months in Maryland, but the offset...
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    Is the oil getting thicker?

    I doubt if the "dipstick drip test" could detect the oxidative thickening change of a couple of centistokes at 100C temperature. Perhaps this drip test observation has more to do with the additive chemistry, as a chemical affinity for the metal surface of the dipstick will cause more oil cling.
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    Re-Use an Amsoil Ea Oil Filter?

    Gary - I can only report what I normally see with my GM 5.3L V8, with a vertical filter position. My observation is that oil drained from the dirty oil side of a used filter visually has more silting, or the soft particles no larger than the 5 micron size, that are normally carried along in the...
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    SA Rated Oil at O'Reilly's

    Some good pictures of a comparison of SA oils vs. GF-3/SL oils performed by the ILMA (Independent Lubricant Manufacturer's Association). <a href="" target="_blank"></a> .
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    Re-Use an Amsoil Ea Oil Filter?

    <blockquote>Quote:<hr /> I have no problem leaving near new oil clean oil in the filter. <hr /></blockquote> But approximately 1/2 the volume of oil in the filter is on the dirty oil side, and is indeed, "dirty". If you cut apart & examined the used filter after an oil change, like many do...
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    Re-Use an Amsoil Ea Oil Filter?

    <blockquote>Quote:<hr /> Not a good idea to remove the filter and re-install it, unless you are going to replace the elastomeric gasket. These things tend to compression set after a while and I think you're asking for a potential drip leak if you re-install the original gasket. <hr...