I would dump the whole bottle of EC30 in, I few extra ounces is not going to hurtUpdate: done…. drained 817g of engine oil, installed a new Toyota oil filter and added 856g of hpl ec. From hpl ec specific gravity @ 0.86g/ml, I calculated 814g per quart, but the actual contents was 856g.
Wait 90 days and do an 6.4qt 5-30 oc.
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