pwrusr

iTrader: (10)

I bought the oil in bulk, so i started pouring the 1st quart and halfway through I realized it was 5w20. So i stopped and and poured the rest of the 6qts as 5w30. Will I be alright?

GS350Lexus

iTrader: (5)

Yea should be no biggie at all.

chris01919

yes, it doesn't matter. just consider it the same as being 5w29.

XxGoKoUxX

as long as it's not synthetic and non-synthetic, you're fine. in other words, keep the synthetic oils with synthetic oils and non-synthetic oils with non-synthetic oils.

worker

6 qt? My V8 takes only a tiny bit over 5qt.

Boron

As said above, mixing synth with synth is fine, and mineral with mineral - just don't mix synth with mineral unless in an emergency to get you to somewhere where the car can be fixed and oil drained/refilled.

Duonghtx

iTrader: (1)

I just mixed my oil actually, it will be fine like all the facts everyone has stated on here.

Brabusx2

i always thought synthetic blend are half dino half syn??

GS350Lexus

iTrader: (5)

Yes the gs350 take 6.6 quarts with oil filter replaced.

GS4_Fiend

iTrader: (22)

Just half a quart is fine..

Boron

I guess when those who know something about oils talk about synthetics, it's taken as a given they're referring to true synths, not the hydrocracked dino marketed as synthetic.

XxGoKoUxX

Still, it's not advised to do that, and I never use anything besides FULL Synthetic. I dont believe nor do I ever endorse half synthetic brands. It's either do it right the first time or don't do it at all

Yes, thanks Boron One should never entrust their engines in that half/half garbage.

Boron

Hydrocracked "synths" are alright, but if you want better protection, etc then it's hard not to opt for the likes of Redline, Motul, Eunos, etc, with their POA/Ester base.
Bit of a waste if you adhere to the outdated and old-fashioned principle of changing oil every 3-5K miles, unless you're annual mileage is under 10K of mainly short journeys.
If you drive a fair bit each time, then the oil isn't as stressed, so the 10K/12 month annual service is more than adequate, and nets you full value for the cost of the better oil used.

I'd still opt to flush the oil, even though synths are much less prone to sludging up, etc like dino (mineral) oil does.