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[danzigfan]

Just changed oil on my Omega yesterday, and oil filter...air filter..etc. I'm using this oil Today, an our ago I changed oil and other things on VW polo 1.4  owned by brother in law.
The thing is, comparing GM 10w 40 and his Valvoline 10w 40, GM oil seems like water. Is that the same as your experiences, guys? TID , Stan

[danzigfan]

Anyway, I change oil every 6000 km, because that's just when my hydraulic lifters start to hear, but it's not bad, only when engine is cold and even that isn't alarming. Engine has 230.000 km on clock, When oil is fresh and new, engine is very quiet

[feeutfo]

We have polo and obviously omega. Gm semi synth in both. As spec by both manufacturers.

[danzigfan]

Specs are the same but GM oil is way of density compared to the others semi synt... Is that ok?

[feeutfo]

Should be the same. Something wrong somewhere....?

[Johnny English]

My guess is if you took it from reliable source no reason to worry. Supposedly there is no significant difference between their density at normal run temperature. 

[danzigfan]

I hope so...See, valvoline was very thick liquid, gm was a bit thicker than some vegetable oil. And it's minus five deg here. Oh, and the hot/warm old oil from my engine was almost as liquid as water

[feeutfo]

Ah, you didn't say you where comparing cold oil with warm.

Cold oil WILL be thicker than warm oil.

[danzigfan]

I know, just wrote it a bit confusing. When draining old oil it was like water. But brand new oil wasn't much better, still too liquid. No thickness in it. Really strange

[feeutfo]

Are you drunk?

[feeutfo]

Or maybe I am?

[danzigfan]

I do not drink, I say only that  original oil was more liquid  from other oil 10W 40 and I was wondering if this is normal or is something wrong with my oil

[aaronjb]

Are you drunk?

Maybe you should try writing in Slovenian and ask danzigfan how it sounds


Anyway .. new oil ought to be fairly runny as it's 'only' 10W40; perhaps the issue is more that the other oil is too thick or, rather, that the GM oil has more stabilisers in so stays consistent over a wider range of temperatures, and the other oil is actually thicker than it should be - given the ambient temperature is well below 0C..

I forget what temperature(s?) the Winter viscosity rating is measured at (the first number), but I bet it's not -5C.. if it's warmer than that, it's quite possible that two oils with the same rating will be very different at -5C.

The '40' is the same, though, so at 100C they should have identical viscosities. In which case, I'd say the GM oil is better (you want it to be thin, not so thin that the surface film breaks down and not so thick that it can't be pumped easily, under all conditions)

[dad1uk]

http://www.omegaowners.com/forum/index.php?action=profile;u=2294

Talk to this guy.
Might not be available till after New Year though.
He is well up on Oil

[danzigfan]

Well, thank you both. It's probably more important what thickness is the oil at operating temperature than the outside temperature. As long as the engine works ilas it should there is no reason for concern I suppose. Thank you (As for my English I  would apologize, I don't use google translate because I ROFL if I try and see the final result of translation  )