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Old 04-07-2019, 06:38 AM   #1
Dogmeat
 
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Oil Question

I know yer spozed to use 5w30 in this car ('11 6 cyl), but I have certificates I can use to get Harley oil free....it's 20w50, but I'm wondering if that's gonna cause any problem? I know it'll increase the friction due to a heavier oil, but other than that, the only thing I can think of it that it'll use a minimal amount of xtra gas......but the engine duzzn't know what it is, so am I wrong in thinking that there's really no problem in using this? Car only has 36500 miles.
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Old 04-07-2019, 06:48 AM   #2
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Absolutely not. One thing you don't want to do is cut corners when it comes to oil. Taken directly from the manual:

Viscosity Grade
Engine Oil Additives/Engine Oil Flushes
SAE 5W-30 is the best viscosity grade for the vehicle. Do not use
other viscosity grade oils such as SAE 10W-30, 10W-40, or 20W-50.
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Last edited by STALKER; 04-07-2019 at 07:00 AM.
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Old 04-07-2019, 06:54 AM   #3
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If I understand its not like the old days. In short if you decide on other oil weights it will not lubricate in the areas it needs to properly. Can and will cause premature engine failure by eventually causing parts to gum up and not be properly lubricated. Those weights are very important especially in newer rides.
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Old 04-07-2019, 02:00 PM   #4
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The main issue with the wrong weight oil in the newer engines is they are clearanced and designed for use with 5w30 oil or whatever oil is recommended. If I was running an LFX or LLT engine, I would definitely want to use what was designed to run in the engine. Some people will say it is just for CAFE and fuel economy reasons, and I am sure that's a part of it, but why risk it?

You will see guys with built bottom ends running different weight oils, but that is usually fine since those engines were built with such oils in mind.

Stock engine? Use manufacturer recommended oil. Just my humble opinion.
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Old 04-07-2019, 05:48 PM   #5
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Penny wise and pound foolish....saving a few bucks on oil to grenade your entire engine cause the oil will not circulate properly.
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Old 04-07-2019, 08:04 PM   #6
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I worked for one of the big three in engineering. I've seen in some cases catastrophic failure going with the wrong engine oil. this is one area i wouldn't cut corners.
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Old 04-07-2019, 08:27 PM   #7
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Is using the wrong oil worth the risk just to save a few bucks? Several years back I had an '87 Callaway Twin-Turbo Corvette; because of the mods Callaway had done, it took 5-50w. This was labeled on the oil filler tube cap, as well as posted in large print on the side of the oil cooler closest to the oil filler tube. About a month after I sold it, I got a call from the new owner asking if I had ever had any engine issues, which I told him no (never did, was one of the best running, maintenance free vehicles I have ever owned). When I asked why, he said he had a catastrophic engine failure, the car was in the shop and insurance wouldn't cover the cost. In talking with him about possible reasons, found out that he changed the oil shortly after buying it, he used 10-30w. A few days later, he called back to inform me the mechanics pretty much confirmed the failure was due to using the wrong oil.
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Old 04-07-2019, 09:54 PM   #8
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20W50 is WAY to think for these cars. I used to us that in an older car that had 300K and i street raced it. Never use in a car less that 200k, ever.
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Old 04-08-2019, 05:57 AM   #9
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Thanx to all for the replies.....confirms what I was thinkin'....I'll continue to use 5w30!!
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Old 04-08-2019, 07:09 AM   #10
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And BTW if you still had a warranty using the wrong grade of oil and letting the dealer know it instantly voids your warranty...………..
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Old 04-08-2019, 07:32 AM   #11
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Quote:
Originally Posted by Dogmeat View Post
Thanx to all for the replies.....confirms what I was thinkin'....I'll continue to use 5w30!!
Lol.....Nice back-peddling......Your original post indicated you saw nothing wrong with using it.....”just a little more fuel...engine won’t know difference.....really no problem using this”.
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Old 04-08-2019, 07:33 AM   #12
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Sell the free Harley oil on Craig's list. You could use 10w30 in the summer, but I wouldn't go thicker.
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Old 04-08-2019, 12:09 PM   #13
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Though I have used it in many application over the years...and never suffered "catastrophic engine failure". I do agree with the statements regarding modern technology. Oil (dino) will penetrate in all the needed areas, no matter how hard you try to stop it.
Bottom line, for a V6 daily driver, no.
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Old 04-08-2019, 01:00 PM   #14
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Engineers put a lot of time and research in designing a engine so it will meet the manufacturers specifications for their warranty so if they state a specific type of oil it`s a good idea to do as recommended. I`m not about to second guess someone who has way more experience than I have.
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