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Engine Oil - A slippery subject Part 2

3505 messages,  Last post on Mar 18, 2009 at 6:13 PM

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What is this discussion about? Engine, Oil


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#3456 of 3505
Re: Castrol 20w-50 [jeffyscott] by shipo
Mar 26, 2008 (5:34 am)
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Replying to: jeffyscott (Mar 26, 2008 4:43 am)

Yes, the "valve train" includes all of the components that operate in the head (in the case of your engine), i.e. the cam (probably the shiny metal thing that you're referring to), cam followers, valve stems, and such. That you can see what is probably a cam lobe is good, the question is, when the cap is off, does the cam lobe sling oil around?
 
Best Regards,
Shipo
#3457 of 3505
Re: Castrol 20w-50 [shipo] by jeffyscott
Mar 27, 2008 (4:33 am)
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Replying to: shipo (Mar 26, 2008 5:34 am)

I must have been thinking of one of our other cars. Could not see any moving parts through the Jetta's oil fill hole...seemed to only see sort of a metal plate, but could see some oil droplets or mist flying around near the edges of that plate. He had already added some STP-like glop, this seems have been enough to get the pressure to stay at ~5 psi with the engine hot (about 200 F).
 
So now the plan is to have some probably 20W-50 put in there, since the pint of glop helped as much as it did, I am hopeful that the 50 weight oil might be enough to keep the light and alarm off for the summer. I hope the 20W is not going too far, too soon, since we still have lows in the 20s and occassionally even lower in April...I just looked it up and all time record low is 7 F for April here, record high is 91 F, though.
#3458 of 3505
Re: Castrol 20w-50 [shipo] by jeffyscott
Mar 28, 2008 (4:32 am)
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Replying to: shipo (Mar 25, 2008 1:49 pm)

I did end up getting a Castrol product...syntec blend. That one is 21.6 cps 100C, for the 20W-50. Somehow I missed that in my previous research.
#3459 of 3505
What if... by wtd44
Apr 07, 2008 (5:46 am)
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If one were to put 5 quarts of 5W-20 plus 1 quart of straight 30 of same brand oil in a 6 quart capacity crankcase (rather than the 6 quarts of 5W-20 specified), would you assume that no harm would result, and that extra protection in hot weather might possibly be achieved?
#3460 of 3505
Re: What if... [wtd44] by texases
Apr 07, 2008 (5:49 am)
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Replying to: wtd44 (Apr 07, 2008 5:46 am)

I doubt any harm would come, but I also doubt there would be much, if any, extra protection. Also, straight 30 weights are often the cheapest grade, with fewer additives, so I'd be a little concerned about that. Does your car's owner's manual only list one oil, regardless of temperature? Some manuals list a more-viscous grade for hot weather.
#3461 of 3505
Re: What if... [texases] by wtd44
Apr 07, 2008 (9:31 am)
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Replying to: texases (Apr 07, 2008 5:49 am)

I've got a few quarts of 30wt left from a case, and I was thinking of getting my nickel's worth out of them this spring and summer. At $108 per barrel on the news today, I hate to "waste" the precious resource!
#3462 of 3505
Re: What if... [wtd44] by jeffyscott
Apr 07, 2008 (9:40 am)
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Replying to: wtd44 (Apr 07, 2008 9:31 am)

Do you have a lawn mower? If so, you should be able to use the 30 wt for that.
#3463 of 3505
Re: What if... [jeffyscott] by imidazol97
Apr 07, 2008 (9:54 am)
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Replying to: jeffyscott (Apr 07, 2008 9:40 am)

When I bought my last Toro the salesman said to use single weight rather than automotive multiweight oils. He said because the little motors are air-cooled they run hotter and the designation of 10-30 weight drops because of the higher temps. He said just use 30.
#3464 of 3505
Re: What if... [imidazol97] by roadburner
Apr 10, 2008 (7:14 am)
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Replying to: imidazol97 (Apr 07, 2008 9:54 am)

Briggs and Kawasaki state that you can use multi-vis oils, but that oil consumption will increase if you use conventional multi-vis oil. Synthetics work fine; I run 10W-30 Mobil 1 in the Briggs and Kawasaki twins on my ZTR mowers.
#3465 of 3505
anecdotal, empirical, or by tired_old_dave
Apr 20, 2008 (11:35 am)
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from 3k to 40k miles of mobil 1 5w30 oil changes, oil rapidly black after an oil change and engine noise developed. then a redline oil change resulting in increased observed performance better ring sealing?, quieter, smoother, and the amber colored aluminum visible thru the oil filler hole is again shiny new aluminium. valvoline syn now with 4k+ miles is still amber colored, and engine noise heard with mobil 1 is absent.

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