I'm switching over to syn in my 90 Lumina Car has 134,500 on it. Burns 0 oil Leaks 0 Oil. Stays at FULL all 4,000 miles. Should I go with Mobil 1 10-30 or 15-50? I use 15-50 in My maxima which has 115,000 on it and formula with 70,000

 

I've been using the 15-50 in my Camaro and has helped the oil pressure a little.

 

I use Mobil 1 Syn. 10-30 in mine, but I have a valve cover leak, so I can't vouch for it beyond that. But I did get the 5 quart jug from Wal-Mart for $11.40

 

$11.40, man it's $17 around here, when I worked there the 10% still didn't help that much.

 

I think it was supposed to be closer to $17, but when she scanned it in, that's what it came up to. I spent $11.40 on Syn. oil, and $8 on a K&N oil filter for a whopping grand total of $19.40. Woohoo!...take that quick lube place. That's cheaper than a standard oil change with a piece of sh*t filter.

 

I've been using Mobil 1 5w-30 for 13 years. This year I added 2 quarts of 15w-50 to raise the viscosity a bit for the hot summer. Oil pressure is good of course, but oil flow is more important for cooling and flushing particulates. Also, a too-thick oil is harder for the engine to work with so it makes the engine temps rise. I once used only 15w-50 oil and the car was noticably sluggish from fighting the extra thick oil.

 

i'd run the heavier oil in the heat and thinner oil in the cold.

 

i'm with ede on this one. i myself run 20-50. here in texas there is no need for thin oil though .

 

I went with the 15w-50. Seems great so far.

 

I didn't know there was an oil besides Mobil 1 15w-50!

 

I have 5w-30 in the car right now but will change to thicker oil next oil change.

 

There's a similar thread going on now at:

https://www.thirdgen.org/techbb2/sho...hreadid=135669


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