Whats your opinion on using 5w-40 Fully Synthetic on these engines over what Toyota recommend (5W-30 OR 10W40 Semi Synthetic)
I have heard of a few people that its almost too good to use on an engine which is now a 20odd year old design, Is it an actual advantage of running this over a good semi synthetic?
Hello Tim & Matt
I have 4efte forged engine on my slalom/rally car in tropical weather (Mauritius)
before installing oil cooler I was getting very high oil temp (up to 145°C). so I installed an oil cooler last year.
on start line engine oil is around 70/75°C, on finish line it reach 115°C
I have been using Castrol edge 10w60 Full synthetic until now
Model: Starlet EP85 with glanza V engine
Engine size/type: 1.3 turbo
Any mods: stock block with garret gt2052 turbo upgrade, afpr, fuelpump. FMIC and free flow exhaust 2.5''
Type of use (road/track) Road use and drag racing
Additional info (max oil temps, current oil used) - No idea on the oil temps, currently using exon 10w-30 and gearbox oil don't know what's in it i want to change it but don't know what to use. it's a AWD manual gearbox
What do you recommend for engine and Gear box. **Note: i live in a tropical country(Suriname) is there a difference between tropical and cold weather??
Personally, I'd go for a 10w or 15w-50, but a good quality one as it will flow better than the 10w-60, but I don't know what you have available.
Yes, it is an advantage to run it over a semi - a good synthetic will give much better protection. Also, seals should not be an issue, quality oils contain agents designed to swell the seals. If the seals aren't good, it may leak, but it should not be any worse with a synthetic than a semi.
Oils are not too 'good' for an engine, they might be wrong, but not too good. That's well proven, including one of the friends of our owner driving a 1931 Austin 7 from John O'Groats to Lands End and back using the Fuchs Pro R 20w-50 Ester synthetic oil.