- Sep 26, 2021
I have a generator now, and I want to put a gallon or maybe two of 15w-40 in storage for it. If I am ever in a power outage a gallon will get me about 8 days of constant use run time - 16 oz per change / 24 hour intervals.
If I am lucky I may never need to use this - so I am looking for an oil that will keep best for years and years. I know technically most places rate 6 year storage, and likely they will last much longer than that. I will store this in a non temperature controlled windowless shed, and the most likely use case will be to run this thing while very hot and humid - south Carolina coast.
Some potential candidates I can get locally - although I could order about anything:
Shell T1 SAE 30 - cSt 100 @ 11.9 - I threw this one in as technically the spec is to use SAE30Shell T4 15w40 - cSt 100 @ 15Delvac Extreme 15w40 cSt 100 @ 14.3 -- full syntheticDelvac 1300 super 15w40 I think this one is cSt 100 @ 14.8, but the literature on this particular formulation confuses me. This one is cheapest - $13 bucks on walmart.com
Or whatever else is out there. Leaning towards the Delvac Extreme because it full synthetic.
Anyone care to weigh in?
I don't think it matters - keep it sealed and in 10 years the oil will still be oil. Even if some of the additives degrade some it will still be GTG for your generator.
But some of the 4-5 quart jugs of oil have a foil seal under the cap - and some don't -
It seems like a solid seal with no air leaks would be better - also gives you tamper resistant seal.
The Supertec, Chevron and Mobil1 have this for sure, not sure about the others.
You could do what I did - find something that looks good that is on sale or clearance. You have time on your side - or
Grab 2 of these - $28.64 for 2 gallons - so $57.28 for 16 quarts - $3.58 a quart --- Free shipping over $35
Or buy one 2 gallon jug of 15w40 Supertec and buy one quart of Valvoline 10W40 for $6.37
$28.64 + 6.37 = $35.01 = free shipping and 9 quarts of oil for $3.89 a quart!!!
Or one 2 gallon jug of 5W40 and one 1 gallon jug!